Change the style of WinForm border? - c#

Is it possible to change the style of a WinForm border? I know that if the border is removed, it takes away the functionality to resize the program. Therefore is there a way to change the style of it, but keep it resizable?


What you seek is not simple because the border is drawn by the operating system. However, there is a library on CodePlex that does make possible to do this very thing.
Drawing Custom Borders in Windows Forms


First write this in the InitializeComponent():
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_RIGHT = 0xB;
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Resize_Form);
Then, use a method similar to this. In this case, my form is only resizable from the right side, but should be easy to make it resize from any side:
private void Resize_Form(object sender, MouseEventArgs e)
{
if ((e.Button == MouseButtons.Left) && (MousePosition.X >= this.Location.X + formWidth - 10))
{
System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.SizeWE;
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_RIGHT, 0);
formWidth = this.Width;
}
}


I dont think there is a direct way to do this.
But, you could set the form border style to None.
And implement the resizing in your form(which I don't think its difficult)


string position = String.Empty;
Point mouseDownPosition = new Point();
private void myForm_MouseDown(object sender, MouseEventArgs e)
{
position = (e.X == 0) ? "Left" : ((e.X == myForm.Width) ? "Right" : String.Empty;
position += (e.Y == 0) ? "Top" : ((e.Y == myForm.Height) ? "Bottom" : String.Empty;
if(position != String.Empty)
{
mouseDownPosition = e.Location;
}
}
private void myForm_MouseMove(object sender, MouseEventArgs e)
{
if(position != String.Empty)
{
Point movementOffset = new Point(e.Location.X - mouseDownPosition.X, e.Location.Y - mouseDownPosition.Y);
Switch(position)
{
Case "LeftTop":
myForm.Location.X += movementOffset.X;
myForm.Location.Y += movementOffset.Y;
myForm.Width -= movementOffset.X;
myForm.Height -= movementOffset.Y;
Case "Left":
myForm.Location.X += movementOffset.X;
myForm.Width -= movementOffset.X;
// Complete the remaining please :)
}
}
}
private void myForm_MouseUp(object sender, MouseEventArgs e)
{
position = String.Empty;
}
P.S: Have not yet tested it
Hope you've set FormBorderStyle to None

Related

C# Event mouse left and move

Can someone help me complete my code , i don't know how to click and move the image
I found on google the code
[DllImport("user32.dll")]
static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);
[Flags]
public enum MouseEventFlags
{
LEFTDOWN = 0x000000002,
LEFTUP = 0x000000004,
MIDDLEDOWN = 0x000000020,
MIDDLEUP = 0x000000040,
MOVE = 0x000000001,
ABSOLUTE = 0x000008000,
RIGHTDOWN = 0x000000008,
RIGHTUP = 0x000000010,
}
public void mousedown(Point p)
{
Cursor.Position = p;
mouse_event((int)(MouseEventFlags.LEFTDOWN), 0, 0, 0, 0);
}
Code find image and move it
private void btntestcode_Click(object sender, EventArgs e)
{
var screen = CaptureHelper.CaptureScreen();
var subBitmap = ImageScanOpenCV.GetImage("testmousemove.PNG");
var resBitmap = ImageScanOpenCV.FindOutPoint((Bitmap)screen, subBitmap);
if (resBitmap != null)
{
mousedown((Point)resBitmap);
}
}

If you want to click on your picture and drag it and you want to move it everywhere, you can use this code.
Add a picture box in your form and set your desired image in it:
I loaded an online image
pictureBox1.Load("http://www.gravatar.com/avatar/6810d91caff032b202c50701dd3af745?d=identicon&r=PG");
Define two variables to save X and Y globally
private int oldX;
private int OldY;
Add a MouseDown event to the PictureBox that you added in step 1:
if(e.Button == MouseButtons.Left)
{
OldX = e.X;
OldY = e.Y;
}
In the end, add a MouseDown event to the PictureBox:
if (e.Button == MouseButtons.Left)
{
pictureBox1.Left += e.X - oldX;
pictureBox1.Top += e.Y - OldY;
}
Here you can see the whole code at once:
public partial class Form1 : Form
{
private int oldX;
private int OldY;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
pictureBox1.Load("http://www.gravatar.com/avatar/6810d91caff032b202c50701dd3af745?d=identicon&r=PG");
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
oldX = e.X;
OldY = e.Y;
}
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
pictureBox1.Left += e.X - oldX;
pictureBox1.Top += e.Y - OldY;
}
}
}

Drag PictureBox

I want to drag a PictureBox, and I have managed to do so. But my application doesn't do it as smoothly as Windows photo viewer. I mean the difference isn't huge or anything, but it's noticeable. Is there something I could do to make it a little less choppy? This is my simple code:
int MOUSE_X = 0;
int MOUSE_Y = 0;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
picBox.Image = Image.FromFile(#"D:\test_big.png");
picBox.Width = 3300;
picBox.Height = 5100;
}
private void picBox_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
MOUSE_X = e.X;
MOUSE_Y = e.Y;
}
}
private void picBox_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
picBox.Left = picBox.Left + (e.X - MOUSE_X);
picBox.Top = picBox.Top + (e.Y - MOUSE_Y);
}
}

Here's a demo that illustrates your approach and the suggested one in the comments.
Testing your code produces:
Whereas the suggested code:
using System.Runtime.InteropServices;
//...
private const int WM_SYSCOMMAND = 0x112;
private const int MOUSE_MOVE = 0xF012;
[DllImport("user32.dll")]
private static extern IntPtr SendMessage(
IntPtr hWnd,
int wMsg,
IntPtr wParam,
IntPtr lParam);
[DllImport("user32.dll")]
private static extern int ReleaseCapture(IntPtr hWnd);
private void picBox_MouseMove(object sender, MouseEventArgs e)
{
if (!DesignMode && e.Button == MouseButtons.Left)
{
ReleaseCapture(picBox.Handle);
SendMessage(picBox.Handle, WM_SYSCOMMAND, (IntPtr)MOUSE_MOVE, IntPtr.Zero);
}
}
Produces:
Note that, I also use a background image to make the situation worse if I may say that. However, without the background image, it hard to detect which code snippet is used.

Windows forms move form from any panel (with border set to none) [duplicate]

Is there a way to make a form that has no border (FormBorderStyle is set to "none") movable when the mouse is clicked down on the form just as if there was a border?

This article on CodeProject details a technique. Is basically boils down to:
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern bool ReleaseCapture();
private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}
This essentially does exactly the same as grabbing the title bar of a window, from the window manager's point of view.

Let's not make things any more difficult than they need to be. I've come across so many snippets of code that allow you to drag a form around (or another Control). And many of them have their own drawbacks/side effects. Especially those ones where they trick Windows into thinking that a Control on a form is the actual form.
That being said, here is my snippet. I use it all the time. I'd also like to note that you should not use this.Invalidate(); as others like to do because it causes the form to flicker in some cases. And in some cases so does this.Refresh. Using this.Update, I have not had any flickering issues:
private bool mouseDown;
private Point lastLocation;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
mouseDown = true;
lastLocation = e.Location;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if(mouseDown)
{
this.Location = new Point(
(this.Location.X - lastLocation.X) + e.X, (this.Location.Y - lastLocation.Y) + e.Y);
this.Update();
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
mouseDown = false;
}

Another simpler way to do the same thing.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// set this.FormBorderStyle to None here if needed
// if set to none, make sure you have a way to close the form!
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_NCHITTEST)
m.Result = (IntPtr)(HT_CAPTION);
}
private const int WM_NCHITTEST = 0x84;
private const int HT_CLIENT = 0x1;
private const int HT_CAPTION = 0x2;
}

use MouseDown, MouseMove and MouseUp. You can set a variable flag for that. I have a sample, but I think you need to revise.
I am coding the mouse action to a panel. Once you click the panel, your form will move with it.
//Global variables;
private bool _dragging = false;
private Point _offset;
private Point _start_point=new Point(0,0);
private void panel1_MouseDown(object sender, MouseEventArgs e)
{
_dragging = true; // _dragging is your variable flag
_start_point = new Point(e.X, e.Y);
}
private void panel1_MouseUp(object sender, MouseEventArgs e)
{
_dragging = false;
}
private void panel1_MouseMove(object sender, MouseEventArgs e)
{
if(_dragging)
{
Point p = PointToScreen(e.Location);
Location = new Point(p.X - this._start_point.X,p.Y - this._start_point.Y);
}
}

WPF only
don't have the exact code to hand, but in a recent project I think I used MouseDown event and simply put this:
frmBorderless.DragMove();
Window.DragMove Method (MSDN)

It worked for Me.
private Point _mouseLoc;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
_mouseLoc = e.Location;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
int dx = e.Location.X - _mouseLoc.X;
int dy = e.Location.Y - _mouseLoc.Y;
this.Location = new Point(this.Location.X + dx, this.Location.Y + dy);
}
}

Ref. video Link
This is tested and easy to understand.
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x84:
base.WndProc(ref m);
if((int)m.Result == 0x1)
m.Result = (IntPtr)0x2;
return;
}
base.WndProc(ref m);
}

Since some answers do not allow for child controls to be draggable, I've created a little helper class.
It should be passed the top level form. Can be made more generic if desired.
class MouseDragger
{
private readonly Form _form;
private Point _mouseDown;
protected void OnMouseDown(object sender, MouseEventArgs e)
{
_mouseDown = e.Location;
}
protected void OnMouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
int dx = e.Location.X - _mouseDown.X;
int dy = e.Location.Y - _mouseDown.Y;
_form.Location = new Point(_form.Location.X + dx, _form.Location.Y + dy);
}
}
public MouseDragger(Form form)
{
_form = form;
MakeDraggable(_form);
}
private void MakeDraggable(Control control)
{
var type = control.GetType();
if (typeof(Button).IsAssignableFrom(type))
{
return;
}
control.MouseDown += OnMouseDown;
control.MouseMove += OnMouseMove;
foreach (Control child in control.Controls)
{
MakeDraggable(child);
}
}
}

There's no property you can flip to make this just happen magically. Look at the events for the form and it becomes fairly trivial to implement this by setting this.Top and this.Left. Specifically you'll want to look at MouseDown, MouseUp and MouseMove.

public Point mouseLocation;
private void frmInstallDevice_MouseDown(object sender, MouseEventArgs e)
{
mouseLocation = new Point(-e.X, -e.Y);
}
private void frmInstallDevice_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
Point mousePos = Control.MousePosition;
mousePos.Offset(mouseLocation.X, mouseLocation.Y);
Location = mousePos;
}
}
this can solve ur problem....

https://social.msdn.microsoft.com/Forums/vstudio/en-US/d803d869-68e6-46ff-9ff1-fabf78d6393c/how-to-make-a-borderless-form-in-c?forum=csharpgeneral
This bit of code from the above link did the trick in my case :)
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button == MouseButtons.Left)
{
this.Capture = false;
Message msg = Message.Create(this.Handle, 0XA1, new IntPtr(2), IntPtr.Zero);
this.WndProc(ref msg);
}
}

Best way I've found (modified of course)
// This adds the event handler for the control
private void AddDrag(Control Control) { Control.MouseDown += new System.Windows.Forms.MouseEventHandler(this.DragForm_MouseDown); }
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
private void DragForm_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
// Checks if Y = 0, if so maximize the form
if (this.Location.Y == 0) { this.WindowState = FormWindowState.Maximized; }
}
}
To apply drag to a control simply insert this after InitializeComponent()
AddDrag(NameOfControl);

For .NET Framework 4,
You can use this.DragMove() for the MouseDown event of the component (mainLayout in this example) you are using to drag.
private void mainLayout_MouseDown(object sender, MouseButtonEventArgs e)
{
this.DragMove();
}

Easiest way is:
First create a label named label1.
Go to label1's events > mouse events > Label1_Mouse Move and write these:
if (e.Button == MouseButtons.Left){
Left += e.X;
Top += e.Y;`
}

I was trying to make a borderless windows form movable which contained a WPF Element Host control and a WPF User control.
I ended up with a stack panel called StackPanel in my WPF user control which seemed the logical thing to try click on to move. Trying junmats's code worked when I moved the mouse slowly, but if I moved the mouse faster, the mouse would move off the form and the form would be stuck somewhere mid move.
This improved on his answer for my situation using CaptureMouse and ReleaseCaptureMouse and now the mouse does not move off the form while moving it even if I move it quickly.
private void StackPanel_MouseDown(object sender, MouseButtonEventArgs e)
{
_start_point = e.GetPosition(this);
StackPanel.CaptureMouse();
}
private void StackPanel_MouseUp(object sender, MouseButtonEventArgs e)
{
StackPanel.ReleaseMouseCapture();
}
private void StackPanel_MouseMove(object sender, MouseEventArgs e)
{
if (StackPanel.IsMouseCaptured)
{
var p = _form.GetMousePositionWindowsForms();
_form.Location = new System.Drawing.Point((int)(p.X - this._start_point.X), (int)(p.Y - this._start_point.Y));
}
}
//Global variables;
private Point _start_point = new Point(0, 0);

I'm expanding the solution from jay_t55 with one more method ToolStrip1_MouseLeave that handles the event of the mouse moving quickly and leaving the region.
private bool mouseDown;
private Point lastLocation;
private void ToolStrip1_MouseDown(object sender, MouseEventArgs e) {
mouseDown = true;
lastLocation = e.Location;
}
private void ToolStrip1_MouseMove(object sender, MouseEventArgs e) {
if (mouseDown) {
this.Location = new Point(
(this.Location.X - lastLocation.X) + e.X, (this.Location.Y - lastLocation.Y) + e.Y);
this.Update();
}
}
private void ToolStrip1_MouseUp(object sender, MouseEventArgs e) {
mouseDown = false;
}
private void ToolStrip1_MouseLeave(object sender, EventArgs e) {
mouseDown = false;
}

Also if you need to DoubleClick and make your Form bigger/smaller , you can use the First answer, create a global int variable, add 1 every time user clicks on the component you use for dragging. If variable == 2 then make your form bigger/smaller. Also use a timer for every half a sec or a second to make your variable = 0;

Adding a MouseLeftButtonDown event handler to the MainWindow worked for me.
In the event function that gets automatically generated, add the below code:
base.OnMouseLeftButtonDown(e);
this.DragMove();

Form1(): new Moveable(control1, control2, control3);
Class:
using System;
using System.Windows.Forms;
class Moveable
{
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
public Moveable(params Control[] controls)
{
foreach (var ctrl in controls)
{
ctrl.MouseDown += (s, e) =>
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(ctrl.FindForm().Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
// Checks if Y = 0, if so maximize the form
if (ctrl.FindForm().Location.Y == 0) { ctrl.FindForm().WindowState = FormWindowState.Maximized; }
}
};
}
}
}

I tried the following and presto changeo, my transparent window was no longer frozen in place but could be moved!! (throw away all those other complex solutions above...)
private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
// Begin dragging the window
this.DragMove();
}

Why i can't change the position of the Form when I set FormBorderStyle None in C# WinForm application [duplicate]

Is there a way to make a form that has no border (FormBorderStyle is set to "none") movable when the mouse is clicked down on the form just as if there was a border?

This article on CodeProject details a technique. Is basically boils down to:
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern bool ReleaseCapture();
private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}
This essentially does exactly the same as grabbing the title bar of a window, from the window manager's point of view.

Let's not make things any more difficult than they need to be. I've come across so many snippets of code that allow you to drag a form around (or another Control). And many of them have their own drawbacks/side effects. Especially those ones where they trick Windows into thinking that a Control on a form is the actual form.
That being said, here is my snippet. I use it all the time. I'd also like to note that you should not use this.Invalidate(); as others like to do because it causes the form to flicker in some cases. And in some cases so does this.Refresh. Using this.Update, I have not had any flickering issues:
private bool mouseDown;
private Point lastLocation;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
mouseDown = true;
lastLocation = e.Location;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if(mouseDown)
{
this.Location = new Point(
(this.Location.X - lastLocation.X) + e.X, (this.Location.Y - lastLocation.Y) + e.Y);
this.Update();
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
mouseDown = false;
}

Another simpler way to do the same thing.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// set this.FormBorderStyle to None here if needed
// if set to none, make sure you have a way to close the form!
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_NCHITTEST)
m.Result = (IntPtr)(HT_CAPTION);
}
private const int WM_NCHITTEST = 0x84;
private const int HT_CLIENT = 0x1;
private const int HT_CAPTION = 0x2;
}

use MouseDown, MouseMove and MouseUp. You can set a variable flag for that. I have a sample, but I think you need to revise.
I am coding the mouse action to a panel. Once you click the panel, your form will move with it.
//Global variables;
private bool _dragging = false;
private Point _offset;
private Point _start_point=new Point(0,0);
private void panel1_MouseDown(object sender, MouseEventArgs e)
{
_dragging = true; // _dragging is your variable flag
_start_point = new Point(e.X, e.Y);
}
private void panel1_MouseUp(object sender, MouseEventArgs e)
{
_dragging = false;
}
private void panel1_MouseMove(object sender, MouseEventArgs e)
{
if(_dragging)
{
Point p = PointToScreen(e.Location);
Location = new Point(p.X - this._start_point.X,p.Y - this._start_point.Y);
}
}

WPF only
don't have the exact code to hand, but in a recent project I think I used MouseDown event and simply put this:
frmBorderless.DragMove();
Window.DragMove Method (MSDN)

It worked for Me.
private Point _mouseLoc;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
_mouseLoc = e.Location;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
int dx = e.Location.X - _mouseLoc.X;
int dy = e.Location.Y - _mouseLoc.Y;
this.Location = new Point(this.Location.X + dx, this.Location.Y + dy);
}
}

Ref. video Link
This is tested and easy to understand.
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x84:
base.WndProc(ref m);
if((int)m.Result == 0x1)
m.Result = (IntPtr)0x2;
return;
}
base.WndProc(ref m);
}

Since some answers do not allow for child controls to be draggable, I've created a little helper class.
It should be passed the top level form. Can be made more generic if desired.
class MouseDragger
{
private readonly Form _form;
private Point _mouseDown;
protected void OnMouseDown(object sender, MouseEventArgs e)
{
_mouseDown = e.Location;
}
protected void OnMouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
int dx = e.Location.X - _mouseDown.X;
int dy = e.Location.Y - _mouseDown.Y;
_form.Location = new Point(_form.Location.X + dx, _form.Location.Y + dy);
}
}
public MouseDragger(Form form)
{
_form = form;
MakeDraggable(_form);
}
private void MakeDraggable(Control control)
{
var type = control.GetType();
if (typeof(Button).IsAssignableFrom(type))
{
return;
}
control.MouseDown += OnMouseDown;
control.MouseMove += OnMouseMove;
foreach (Control child in control.Controls)
{
MakeDraggable(child);
}
}
}

There's no property you can flip to make this just happen magically. Look at the events for the form and it becomes fairly trivial to implement this by setting this.Top and this.Left. Specifically you'll want to look at MouseDown, MouseUp and MouseMove.

public Point mouseLocation;
private void frmInstallDevice_MouseDown(object sender, MouseEventArgs e)
{
mouseLocation = new Point(-e.X, -e.Y);
}
private void frmInstallDevice_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
Point mousePos = Control.MousePosition;
mousePos.Offset(mouseLocation.X, mouseLocation.Y);
Location = mousePos;
}
}
this can solve ur problem....

https://social.msdn.microsoft.com/Forums/vstudio/en-US/d803d869-68e6-46ff-9ff1-fabf78d6393c/how-to-make-a-borderless-form-in-c?forum=csharpgeneral
This bit of code from the above link did the trick in my case :)
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button == MouseButtons.Left)
{
this.Capture = false;
Message msg = Message.Create(this.Handle, 0XA1, new IntPtr(2), IntPtr.Zero);
this.WndProc(ref msg);
}
}

Best way I've found (modified of course)
// This adds the event handler for the control
private void AddDrag(Control Control) { Control.MouseDown += new System.Windows.Forms.MouseEventHandler(this.DragForm_MouseDown); }
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
private void DragForm_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
// Checks if Y = 0, if so maximize the form
if (this.Location.Y == 0) { this.WindowState = FormWindowState.Maximized; }
}
}
To apply drag to a control simply insert this after InitializeComponent()
AddDrag(NameOfControl);

For .NET Framework 4,
You can use this.DragMove() for the MouseDown event of the component (mainLayout in this example) you are using to drag.
private void mainLayout_MouseDown(object sender, MouseButtonEventArgs e)
{
this.DragMove();
}

Easiest way is:
First create a label named label1.
Go to label1's events > mouse events > Label1_Mouse Move and write these:
if (e.Button == MouseButtons.Left){
Left += e.X;
Top += e.Y;`
}

I was trying to make a borderless windows form movable which contained a WPF Element Host control and a WPF User control.
I ended up with a stack panel called StackPanel in my WPF user control which seemed the logical thing to try click on to move. Trying junmats's code worked when I moved the mouse slowly, but if I moved the mouse faster, the mouse would move off the form and the form would be stuck somewhere mid move.
This improved on his answer for my situation using CaptureMouse and ReleaseCaptureMouse and now the mouse does not move off the form while moving it even if I move it quickly.
private void StackPanel_MouseDown(object sender, MouseButtonEventArgs e)
{
_start_point = e.GetPosition(this);
StackPanel.CaptureMouse();
}
private void StackPanel_MouseUp(object sender, MouseButtonEventArgs e)
{
StackPanel.ReleaseMouseCapture();
}
private void StackPanel_MouseMove(object sender, MouseEventArgs e)
{
if (StackPanel.IsMouseCaptured)
{
var p = _form.GetMousePositionWindowsForms();
_form.Location = new System.Drawing.Point((int)(p.X - this._start_point.X), (int)(p.Y - this._start_point.Y));
}
}
//Global variables;
private Point _start_point = new Point(0, 0);

I'm expanding the solution from jay_t55 with one more method ToolStrip1_MouseLeave that handles the event of the mouse moving quickly and leaving the region.
private bool mouseDown;
private Point lastLocation;
private void ToolStrip1_MouseDown(object sender, MouseEventArgs e) {
mouseDown = true;
lastLocation = e.Location;
}
private void ToolStrip1_MouseMove(object sender, MouseEventArgs e) {
if (mouseDown) {
this.Location = new Point(
(this.Location.X - lastLocation.X) + e.X, (this.Location.Y - lastLocation.Y) + e.Y);
this.Update();
}
}
private void ToolStrip1_MouseUp(object sender, MouseEventArgs e) {
mouseDown = false;
}
private void ToolStrip1_MouseLeave(object sender, EventArgs e) {
mouseDown = false;
}

Also if you need to DoubleClick and make your Form bigger/smaller , you can use the First answer, create a global int variable, add 1 every time user clicks on the component you use for dragging. If variable == 2 then make your form bigger/smaller. Also use a timer for every half a sec or a second to make your variable = 0;

Adding a MouseLeftButtonDown event handler to the MainWindow worked for me.
In the event function that gets automatically generated, add the below code:
base.OnMouseLeftButtonDown(e);
this.DragMove();

Form1(): new Moveable(control1, control2, control3);
Class:
using System;
using System.Windows.Forms;
class Moveable
{
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
public Moveable(params Control[] controls)
{
foreach (var ctrl in controls)
{
ctrl.MouseDown += (s, e) =>
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(ctrl.FindForm().Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
// Checks if Y = 0, if so maximize the form
if (ctrl.FindForm().Location.Y == 0) { ctrl.FindForm().WindowState = FormWindowState.Maximized; }
}
};
}
}
}

I tried the following and presto changeo, my transparent window was no longer frozen in place but could be moved!! (throw away all those other complex solutions above...)
private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
// Begin dragging the window
this.DragMove();
}

Move window without border

How do I move a window that does not have a border. There is no empty space on the application, all that is available is a webbrowser and a menustrip. I would like the users to be able to move the window by dragging the menu strip. How do I code this? I have tried a few code blocks I have found online, but none of them worked.

This Code Project article should help you accomplish this. I've used this myself with no problems. This is the jist of it:
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}
This will basically "trick" the window manager into thinking that it is grabbing the title bar of the winform.
To apply it to your project, just use the MouseDown event from the MenuStrip.

Here is the .Net Way
private bool dragging = false;
private Point dragCursorPoint;
private Point dragFormPoint;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
dragging = true;
dragCursorPoint = Cursor.Position;
dragFormPoint = this.Location;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (dragging)
{
Point dif = Point.Subtract(Cursor.Position, new Size(dragCursorPoint));
this.Location = Point.Add(dragFormPoint, new Size(dif));
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
dragging = false;
}
that's it.

Just put the start point into an 2D Array like this:
public partial class mainForm : Form
{
//Global variables for Moving a Borderless Form
private bool dragging = false;
private Point startPoint = new Point(0, 0);
public mainForm()
{
InitializeComponent();
}
private void mainForm_MouseDown(object sender, MouseEventArgs e)
{
dragging = true;
startPoint = new Point(e.X, e.Y);
}
private void mainForm_MouseUp(object sender, MouseEventArgs e)
{
dragging = false;
}
private void mainForm_MouseMove(object sender, MouseEventArgs e)
{
if (dragging)
{
Point p = PointToScreen(e.Location);
Location = new Point(p.X - this.startPoint.X, p.Y - this.startPoint.Y);
}
}
}

You can fake your menustrip, for example using a panel with a label instead. And then you can handle this manually: when the user clicks the label, a popup menu will open, and when the user drags the label, the window will move. But I would advise against such workarounds, because it's not a standard GUI behavior, and you might get your users confused.

I haven't tried it, but if you can handle the "OnMouseDown" and "onMouseUp" events on the menu bar:
On mouse down - Move the window according to the mouse movement
Stop tracking the mouse movement on mouse up, or mouse out

If you are using a Panel you have to add this in the
YourForm.Designer.cs
this.panel1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseDown);
and this in the
YourForm.cs
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
private void panel1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}

Mbithi Kioko is on the right track but i would do it this way.
bool dragging = false;
int xOffset = 0;
int yOffset = 0;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
dragging = true;
xOffset = Cursor.Position.X - this.Location.X;
yOffset = Cursor.Position.Y - this.Location.Y;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (dragging)
{
this.Location = new Point(Cursor.Position.X - xOffset, Cursor.Position.Y - yOffset);
this.Update();
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
dragging = false;
}

I had to use System.Runtime.InteropServices.DllImportAttribute - just thought I would comment and let you all know.

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