In my windows.forms c# application, I have a multi-line textbox with WordWrap = true. After I set Text property to a long string, I need to get all lines produced by wrapping. It is not the same as Lines[] property, because my text does not include new line characters.
I have found solutions using graphics MeasureString function but it seems a little bit extra work considering that the textbox control already did the wrapping - why should I do the same work again?
Is there any way to get the lines into which the textbox wraps the text?
Thank you
Can you check the below solution,
public Form1()
{
InitializeComponent();
textBox1.Text = "This is my text where I want to check how I can get wrapped content as seperate lines automatically !! This is my text which I want to check how I can get wrapped content as seperate lines automatically !!";
}
private void button1_Click(object sender, EventArgs e)
{
bool continueProcess = true;
int i = 1; //Zero Based So Start from 1
int j = 0;
List<string> lines = new List<string>();
while (continueProcess)
{
var index = textBox1.GetFirstCharIndexFromLine(i);
if (index != -1)
{
lines.Add(textBox1.Text.Substring(j, index - j));
j = index;
i++;
}
else
{
lines.Add(textBox1.Text.Substring(j, textBox1.Text.Length - j));
continueProcess = false;
}
}
foreach(var item in lines)
{
MessageBox.Show(item);
}
}
GetFirstCharIndexFromLine Reference
Line numbering in the text box starts at zero. If the lineNumber
parameter is greater than the last line in the text box,
GetFirstCharIndexFromLine returns -1.
GetFirstCharIndexFromLine returns the first character index of a
physical line. The physical line is the displayed line, not the
assigned line. The number of displayed lines can be greater than the
number of assigned lines due to word wrap. For example, if you assign
two long lines to a RichTextBox control and set Multiline and WordWrap
to true, the two long assigned lines result in four physical (or
displayed lines).
A little pinvoking would work:
private const UInt32 EM_GETLINECOUNT = 0xba;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
private void button1_Click(object sender, EventArgs e) {
int numLines = SendMessage(textBox1.Handle,
EM_GETLINECOUNT, IntPtr.Zero, IntPtr.Zero).ToInt32()
MessageBox.Show(numLines.ToString());
}
REVISED ANSWER
I checked the Win32 APIs again and realized it could be done easily. I wrote an extension method so you can do it even easier:
using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
static class TextBoxExtensions
{
private const uint EM_FMTLINES = 0x00C8;
private const uint WM_GETTEXT = 0x000D;
private const uint WM_GETTEXTLENGTH = 0x000E;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, int wParam, IntPtr lParam);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, int wParam, StringBuilder lParam);
public static string[] GetWrappedLines(this TextBox textBox)
{
var handle = textBox.Handle;
SendMessage(handle, EM_FMTLINES, 1, IntPtr.Zero);
var size = SendMessage(handle, WM_GETTEXTLENGTH, IntPtr.Zero, IntPtr.Zero).ToInt32();
if (size > 0)
{
var builder = new StringBuilder(size + 1);
SendMessage(handle, WM_GETTEXT, builder.Capacity, builder);
return builder.ToString().Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
}
return new string[0];
}
}
}
usage:
var lines = textBox1.GetWrappedLines();
ORIGINAL ANSWER
WinForm TextBox is actually a wrapper of Windows GDI edit control, which handles text wrapping natively. That being said, even if the TextBox keeps an array of wrapped lines, it is not exposed by public API, not even brought to managed environment (which, if it did, can however be retrieved with reflection). So your best bet is still MeasureString.
To check if particular line is wrapped or not, here is the GDI Function you need to use:
1. [DllImport("user32.dll")]
static extern int DrawText(IntPtr hdc, string lpStr, int nCount, ref Dimension lpRect, int wFormat);
Here are what you need to get things done:
public enum DrawTextFlags
{
CalculateArea = 0x00000400,
WordBreak = 0x00000010,
TextBoxControl = 0x00002000,
Top = 0x00000000,
Left = 0x00000000,
HorizontalCenter = 0x00000001,
Right = 0x00000002,
VerticalCenter = 0x00000004,
Bottom = 0x00000008,
SingleLine = 0x00000020,
ExpandTabs = 0x00000040,
TabStop = 0x00000080,
NoClipping = 0x00000100,
ExternalLeading = 0x00000200,
NoPrefix = 0x00000800,
Internal = 0x00001000,
PathEllipsis = 0x00004000,
EndEllipsis = 0x00008000,
WordEllipsis = 0x00040000,
ModifyString = 0x00010000,
RightToLeft = 0x00020000,
NoFullWidthCharacterBreak = 0x00080000,
HidePrefix = 0x00100000,
PrefixOnly = 0x00200000,
NoPadding = 0x10000000,
}
[StructLayout(LayoutKind.Sequential)]
public struct Dimension
{
public int Left, Top, Right, Bottom;
public Dimension(int left, int top, int right, int bottom)
{
this.Left = left;
this.Right = right;
this.Top = top;
this.Bottom = bottom;
}
public Dimension(Rectangle r)
{
this.Left = r.Left;
this.Top = r.Top;
this.Bottom = r.Bottom;
this.Right = r.Right;
}
public static implicit operator Rectangle(Dimension rc)
{
return Rectangle.FromLTRB(rc.Left, rc.Top, rc.Right, rc.Bottom);
}
public static implicit operator Dimension(Rectangle rc)
{
return new Dimension(rc);
}
public static Dimension Default
{
get { return new Dimension(0, 0, 1, 1); }
}
}
So to know whether a particular line is wrapped or not, you would call the function like this:
Dimension rc = new Dimension(0,0,2,2);
var flag = DrawTextFlags.CalculateArea | DrawTextFlags.TextBoxControl | DrawTextFlags.WordBreak;
DrawText(hdc, line, line.length, ref rc, (int)flag);
Now if height of rc you get after executing this function is greater then your font height or tmHeight if you use TextMetric (that is what minimum required for a line to fit vertically) you can safely assume your line is wrapped.
Apart from this,
You can use the following function as an alternative approach:
static extern bool GetTextExtentExPoint(IntPtr hDc, string str, int nLength,
int nMaxExtent, int[] lpnFit, int[] alpDx, ref Size size);
Related
This question already has answers here:
RichTextBox syntax highlighting in real time--Disabling the repaint
(3 answers)
Closed 2 years ago.
I'm doing a text editor based on RichTextBox. It has to handle complex formatting (BIU, colored text, etc). The problem is that all formatting tools are selection based, e.g. i have to select piece of text, format it, select next, etc.
it takes time, and it is visible for user.
is there a way to turn-off RichTextBox redraw, then do formatting, then turn-on redraw?
Or maybe any other way to handel complex formatting quickly?
Decision found and it's working.
Wrote a wrap-class using this code
Class itself:
public class RichTextBoxRedrawHandler
{
RichTextBox rtb;
public RichTextBoxRedrawHandler (RichTextBox _rtb)
{
rtb = _rtb;
}
[DllImport("user32.dll")]
private static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, int wParam, ref Point lParam);
[DllImport("user32.dll")]
private static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, int wParam, IntPtr lParam);
const int WM_USER = 1024;
const int WM_SETREDRAW = 11;
const int EM_GETEVENTMASK = WM_USER + 59;
const int EM_SETEVENTMASK = WM_USER + 69;
const int EM_GETSCROLLPOS = WM_USER + 221;
const int EM_SETSCROLLPOS = WM_USER + 222;
private Point _ScrollPoint;
private bool _Painting = true;
private IntPtr _EventMask;
private int _SuspendIndex = 0;
private int _SuspendLength = 0;
public void SuspendPainting()
{
if (_Painting)
{
_SuspendIndex = rtb.SelectionStart;
_SuspendLength = rtb.SelectionLength;
SendMessage(rtb.Handle, EM_GETSCROLLPOS, 0, ref _ScrollPoint);
SendMessage(rtb.Handle, WM_SETREDRAW, 0, IntPtr.Zero);
_EventMask = SendMessage(rtb.Handle, EM_GETEVENTMASK, 0, IntPtr.Zero);
_Painting = false;
}
}
public void ResumePainting()
{
if (!_Painting)
{
rtb.Select(_SuspendIndex, _SuspendLength);
SendMessage(rtb.Handle, EM_SETSCROLLPOS, 0, ref _ScrollPoint);
SendMessage(rtb.Handle, EM_SETEVENTMASK, 0, _EventMask);
SendMessage(rtb.Handle, WM_SETREDRAW, 1, IntPtr.Zero);
_Painting = true;
rtb.Invalidate();
}
}
}
Usage:
RichTextBoxRedrawHandler rh = new RichTextBoxRedrawHandler(richTextBoxActually);
rh.SuspendPainting();
// do things with richTextBox
rh.ResumePainting();
I am creating a winforms application in visual studio 2017, I am populating the list box using a List.
I set the multicolumn property to true. Since I have lots of strings in my list, there is a horizontal scrollbar appearing at the bottom of the box.
The application I am creating should be working on a tablet, so therefore the scroll bar is not easy to navigate using fingers.
My question is, is there a way to be able to control this scrollbar using a button ?
Yes, It is possible to control the behavior you are expecting with the help of Buttons.
To move from right to left -
private void btnLeft_Click(object sender, EventArgs e)
{
int visibleItemsInColumn = listBox1.ClientSize.Height / listBox1.ItemHeight; //No of items in each column. In this case - 5
listBox1.TopIndex = listBox1.TopIndex - visibleItemsInColumn;
}
To move from left to right -
private void btnRight_Click(object sender, EventArgs e)
{
int visibleItemsInColumn = listBox1.ClientSize.Height / listBox1.ItemHeight;
listBox1.TopIndex = listBox1.TopIndex + visibleItemsInColumn;
}
What it actually does is every time you click on button, It
increases/decreases the TopIndex by the total elements per columns. So
on each clicks, you move one column either left or right.
You can send WM_HSCROLL message to the ListBox to scroll it. To do so, you should first get the scroll position by calling GetScrollInfo methods.
The following code, scrolls the ListBox, 1 column to the right:
var info = new SCROLLINFO() { fMask = ScrollInfoMask.SIF_ALL };
GetScrollInfo(listBox1.Handle, SBOrientation.SB_HORZ, ref info);
var wparam = ((uint)(info.nPos + 1) << 16) | (SB_THUMBPOSITION & 0xffff);
SendMessage(listBox1.Handle, WM_HSCROLL, wparam, 0);
To scroll one column to the left, use info.nPos - 1.
Here are the declarations which you need:
[DllImport("user32.dll")]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg,
uint wParam, uint lParam);
[StructLayout(LayoutKind.Sequential)]
struct SCROLLINFO {
public uint cbSize;
public ScrollInfoMask fMask;
public int nMin;
public int nMax;
public uint nPage;
public int nPos;
public int nTrackPos;
}
public enum ScrollInfoMask : uint {
SIF_RANGE = 0x1,
SIF_PAGE = 0x2,
SIF_POS = 0x4,
SIF_DISABLENOSCROLL = 0x8,
SIF_TRACKPOS = 0x10,
SIF_ALL = (SIF_RANGE | SIF_PAGE | SIF_POS | SIF_TRACKPOS),
}
[DllImport("user32.dll")]
private static extern bool GetScrollInfo(IntPtr hwnd,
SBOrientation fnBar, ref SCROLLINFO lpsi);
public enum SBOrientation : int {
SB_HORZ = 0x0,
SB_VERT = 0x1,
}
const uint WM_HSCROLL = 0x0114;
const uint SB_THUMBPOSITION = 4;
I have a MS Word Application Add-in written with VSTO. It contains a button used to create new Letter documents. When pressed a document is instantiated, a WPF dialog is displayed to capture information and then the information is inserted into the document.
On one of my test machines I get the following exception when approximately 40 letters are created in a single Word session:
The disk is full. Free some space on this drive, or save the document
on another disk.
Try one or more of the following:
Close any unneeded documents, programs or windows.
Save the document to another disk.
So I monitored the Winword.exe process using Task Manager:
Memory starts at 97,000k
Memory steadily increases with each letter document until the error is seen at approximately 1,000,000k
If I then close all the documents the memory only drops down to 500,000k
Any tips on how I can troubleshoot the memory leak?
I've gone through my code and ensured that event handlers are unregistered and that i'm disposing objects that need disposing.
Any reference articles that I should be reading?
-- Edit --
Malick, I use unmanaged code to make the WPF window look like an Office dialog. Is there a better way of doing this? I'll try removing it. (edit, there wasn't a change. I'll try the memory monitoring tools)
public class OfficeDialog : Window
{
[DllImport("user32.dll")]
static extern int GetWindowLong(IntPtr hwnd, int index);
[DllImport("user32.dll")]
static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle);
[DllImport("user32.dll")]
static extern bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter, int x, int y, int width, int height, uint flags);
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam, IntPtr lParam);
const int GWL_EXSTYLE = -20;
const int WS_EX_DLGMODALFRAME = 0x0001;
const int SWP_NOSIZE = 0x0001;
const int SWP_NOMOVE = 0x0002;
const int SWP_NOZORDER = 0x0004;
const int SWP_FRAMECHANGED = 0x0020;
const uint WM_SETICON = 0x0080;
const int ICON_SMALL = 0;
const int ICON_BIG = 1;
public OfficeDialog()
{
this.ShowInTaskbar = false;
//this.Topmost = true;
}
public new void ShowDialog()
{
try
{
var helper = new WindowInteropHelper(this);
using (Process currentProcess = Process.GetCurrentProcess())
helper.Owner = currentProcess.MainWindowHandle;
base.ShowDialog();
}
catch (System.ComponentModel.Win32Exception ex)
{
Message.LogWarning(ex);
//this.Topmost = true;
var helper = new WindowInteropHelper(this);
using (Process currentProcess = Process.GetCurrentProcess())
helper.Owner = currentProcess.MainWindowHandle;
base.ShowDialog();
}
}
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
RemoveIcon(this);
HideMinimizeAndMaximizeButtons(this);
//using (Process currentProcess = Process.GetCurrentProcess())
// SetCentering(this, currentProcess.MainWindowHandle);
}
public static void HideMinimizeAndMaximizeButtons(Window window)
{
const int GWL_STYLE = -16;
IntPtr hwnd = new WindowInteropHelper(window).Handle;
long value = GetWindowLong(hwnd, GWL_STYLE);
SetWindowLong(hwnd, GWL_STYLE, (int)(value & -131073 & -65537));
}
public static void RemoveIcon(Window w)
{
// Get this window's handle
IntPtr hwnd = new WindowInteropHelper(w).Handle;
// Change the extended window style to not show a window icon
int extendedStyle = OfficeDialog.GetWindowLong(hwnd, GWL_EXSTYLE);
OfficeDialog.SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_DLGMODALFRAME);
// reset the icon, both calls important
OfficeDialog.SendMessage(hwnd, WM_SETICON, (IntPtr)ICON_SMALL, IntPtr.Zero);
OfficeDialog.SendMessage(hwnd, WM_SETICON, (IntPtr)ICON_BIG, IntPtr.Zero);
// Update the window's non-client area to reflect the changes
OfficeDialog.SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
}
static void SetCentering(Window win, IntPtr ownerHandle)
{
bool isWindow = IsWindow(ownerHandle);
if (!isWindow) //Don't try and centre the window if the ownerHandle is invalid. To resolve issue with invalid window handle error
{
//Message.LogInfo(string.Format("ownerHandle IsWindow: {0}", isWindow));
return;
}
//Show in center of owner if win form.
if (ownerHandle.ToInt32() != 0)
{
var helper = new WindowInteropHelper(win);
helper.Owner = ownerHandle;
win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
}
else
win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
}
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool IsWindow(IntPtr hWnd);
}
Let me start by saying that I am no stranger to using winapi calls to manipulate other windows, but this is the first time I have seen a window that has two identical control IDs. It seems that the color dialog hasn't changed much between windows versions and I can confirm that this behavior exists on all color dialogs from Windows Vista through to Windows 10 (possibly exists in win xp and lower as well but I can't be bothered to check).
What I am attempting to do is use winapi calls to localize the text in a color dialog control in C#. The best way I have found to do this is to use GetDlgItem() to get a handle to the control I wish to change and then use SetWindowText() to actually change the text. This works great for all controls on the color dialog except for the 'Basic colors:' and 'Custom colors:' labels, which both have a control ID of 0xFFFF (decimal value: 65535).
I use an app called WinID to do this type of work (I find it much easier than using Spy++) and you can see from the screenshots below that the ID of the two text labels do in-fact register as the same ID.
NOTE: I have
tested this using Spy++ and of course I get the same values as shown below:
I would like to know 2 things:
How is it possible for 2 controls to have the same control id?
Is there a 'better way' to get a handle to a control from an external dialog/app using winapi calls? Please keep in mind that using something like FindWindowEx(nColorDialogHandle, IntPtr.Zero, "Static", "&custom colors:"); works, but is not useful to me because I must be able to find the handle without relying on the text in English since this must also work on color dialogs from a non-English version of Windows.
Below is some sample code to demonstrate how I am currently able to change the text on a color dialog. I am happy with the code except that I am unable to get a direct handle to the 'Custom colors:' label since using GetDlgItem() with the control id of 0xFFFF seems to return a handle to the first instance of the control with that ID (in this case it always returns a handle to the 'Basic colors:' label). The only way I am able to get the 'Custom colors:' handle is by using an indirect method of looping through all controls on the color dialog until I find one with text that has not already been changed. This works fine but I would like to know if there is a more direct way to get this handle without looping through controls:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
// Open the color dialog before the form actually loads
ColorDialogEx oColorDialog = new ColorDialogEx(this.CreateGraphics());
oColorDialog.FullOpen = true;
oColorDialog.ShowDialog();
}
}
public class ColorDialogEx : ColorDialog
{
private const Int32 WM_INITDIALOG = 0x0110; // Windows Message Constant
private Graphics oGraphics;
private const uint GW_HWNDLAST = 1;
private const uint GW_HWNDPREV = 3;
private string sColorPickerText = "1-Color Picker";
private string sBasicColorsText = "2-Basic colors:";
private string sDefineCustomColorsButtonText = "3-Define Custom Colors >>";
private string sOKButtonText = "4-OK";
private string sCancelButtonText = "5-Cancel";
private string sAddToCustomColorsButtonText = "6-Add to Custom Colors";
private string sColorText = "7-Color";
private string sSolidText = "|8-Solid";
private string sHueText = "9-Hue:";
private string sSatText = "10-Sat:";
private string sLumText = "11-Lum:";
private string sRedText = "12-Red:";
private string sGreenText = "13-Green:";
private string sBlueText = "14-Blue:";
private string sCustomColorsText = "15-Custom colors:";
// WinAPI definitions
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern bool SetWindowText(IntPtr hWnd, string text);
[DllImport("user32.dll", SetLastError = true)]
internal static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);
[DllImport("user32.dll")]
public static extern long GetWindowRect(int hWnd, ref Rectangle lpRect);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetTitleBarInfo(IntPtr hwnd, ref TITLEBARINFO pti);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
[DllImport("user32.dll")]
private static extern IntPtr GetDlgItem(IntPtr hDlg, int nIDDlgItem);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern int GetClassName(IntPtr hWnd, System.Text.StringBuilder lpClassName, int nMaxCount);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);
[StructLayout(LayoutKind.Sequential)]
struct TITLEBARINFO
{
public const int CCHILDREN_TITLEBAR = 5;
public uint cbSize;
public RECT rcTitleBar;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = CCHILDREN_TITLEBAR + 1)]
public uint[] rgstate;
}
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int Left, Top, Right, Bottom;
public RECT(int left, int top, int right, int bottom)
{
Left = left;
Top = top;
Right = right;
Bottom = bottom;
}
public RECT(System.Drawing.Rectangle r) : this(r.Left, r.Top, r.Right, r.Bottom) { }
public int X
{
get { return Left; }
set { Right -= (Left - value); Left = value; }
}
public int Y
{
get { return Top; }
set { Bottom -= (Top - value); Top = value; }
}
public int Height
{
get { return Bottom - Top; }
set { Bottom = value + Top; }
}
public int Width
{
get { return Right - Left; }
set { Right = value + Left; }
}
public System.Drawing.Point Location
{
get { return new System.Drawing.Point(Left, Top); }
set { X = value.X; Y = value.Y; }
}
public System.Drawing.Size Size
{
get { return new System.Drawing.Size(Width, Height); }
set { Width = value.Width; Height = value.Height; }
}
public static implicit operator System.Drawing.Rectangle(RECT r)
{
return new System.Drawing.Rectangle(r.Left, r.Top, r.Width, r.Height);
}
public static implicit operator RECT(System.Drawing.Rectangle r)
{
return new RECT(r);
}
public static bool operator ==(RECT r1, RECT r2)
{
return r1.Equals(r2);
}
public static bool operator !=(RECT r1, RECT r2)
{
return !r1.Equals(r2);
}
public bool Equals(RECT r)
{
return r.Left == Left && r.Top == Top && r.Right == Right && r.Bottom == Bottom;
}
public override bool Equals(object obj)
{
if (obj is RECT)
return Equals((RECT)obj);
else if (obj is System.Drawing.Rectangle)
return Equals(new RECT((System.Drawing.Rectangle)obj));
return false;
}
public override int GetHashCode()
{
return ((System.Drawing.Rectangle)this).GetHashCode();
}
public override string ToString()
{
return string.Format(System.Globalization.CultureInfo.CurrentCulture, "{{Left={0},Top={1},Right={2},Bottom={3}}}", Left, Top, Right, Bottom);
}
}
public ColorDialogEx(Graphics g)
{
oGraphics = g;
}
protected override IntPtr HookProc(IntPtr nColorDialogHandle, int msg, IntPtr wparam, IntPtr lparam)
{
IntPtr returnValue = base.HookProc(nColorDialogHandle, msg, wparam, lparam);
if (msg == WM_INITDIALOG)
{
IntPtr[] oStaticHandleArray = new IntPtr[9];
// Change the window title
SetWindowText(nColorDialogHandle, sColorPickerText);
// Get titlebar info for calculations later
TITLEBARINFO oTITLEBARINFO = new TITLEBARINFO();
oTITLEBARINFO.cbSize = (uint)System.Runtime.InteropServices.Marshal.SizeOf(oTITLEBARINFO);
GetTitleBarInfo(nColorDialogHandle, ref oTITLEBARINFO);
// Change the text of the "Basic colors:" label
oStaticHandleArray[0] = GetDlgItem(nColorDialogHandle, 0xFFFF);
SetWindowText(oStaticHandleArray[0], sBasicColorsText);
// Change the text of the "Define Custom Colors >>" button
SetWindowText(GetDlgItem(nColorDialogHandle, 0x2CF), sDefineCustomColorsButtonText);
// Save the "OK" button size and new width
Rectangle oOKButtonRect = new Rectangle();
int nOKButtonWidth = (int)oGraphics.MeasureString(sOKButtonText, new Font("Microsoft Sans Serif", 8, FontStyle.Regular)).Width + 20; // +20 accounts for extra +10 padding on either side
// Find the "OK" Button
IntPtr nChildHandle = GetDlgItem(nColorDialogHandle, 0x1);
if (nChildHandle.ToInt32() > 0)
{
// The "OK" button was found
// Now save the current size and position
GetWindowRect(nChildHandle.ToInt32(), ref oOKButtonRect);
// We have to subtract oOKButtonRect.X value from oOKButtonRect.Width to obtain the "real" button width (same thing with subtracting Y value from Height)
oOKButtonRect.Width = oOKButtonRect.Width - oOKButtonRect.X;
oOKButtonRect.Height = oOKButtonRect.Height - oOKButtonRect.Y;
// Resize the "OK" button so that the new text fits properly
// NOTE: I cannot be sure 100% if it is correct to use the titlebar to find the position of the button or not but the math works out in all of my tests
MoveWindow(nChildHandle, oOKButtonRect.X - oTITLEBARINFO.rcTitleBar.X, oOKButtonRect.Y - oTITLEBARINFO.rcTitleBar.Y - oTITLEBARINFO.rcTitleBar.Height, nOKButtonWidth, oOKButtonRect.Height, true);
// Finally, change the button text
SetWindowText(nChildHandle, sOKButtonText);
}
// Find the "Cancel" Button
nChildHandle = GetDlgItem(nColorDialogHandle, 0x2);
if (nChildHandle.ToInt32() > 0)
{
// The "Cancel" button was found
// Now get the current size and position
Rectangle oCancelButtonRect = new Rectangle();
GetWindowRect(nChildHandle.ToInt32(), ref oCancelButtonRect);
// We have to subtract oCancelButtonRect.X value from oCancelButtonRect.Width to obtain the "real" button width (same thing with subtracting Y value from Height)
oCancelButtonRect.Width = oCancelButtonRect.Width - oCancelButtonRect.X;
oCancelButtonRect.Height = oCancelButtonRect.Height - oCancelButtonRect.Y;
// Resize the "Cancel" button so that the new text fits properly
// NOTE: I cannot be sure 100% if it correct to use the titlebar to find the position of the button or not but the math works out in all of my tests
MoveWindow(nChildHandle, oOKButtonRect.X + nOKButtonWidth - oTITLEBARINFO.rcTitleBar.X + 6, oCancelButtonRect.Y - oTITLEBARINFO.rcTitleBar.Y - oTITLEBARINFO.rcTitleBar.Height, (int)oGraphics.MeasureString(sCancelButtonText, new Font("Microsoft Sans Serif", 8, FontStyle.Regular)).Width + 20, oCancelButtonRect.Height, true);
// Finally, change the button text
SetWindowText(nChildHandle, sCancelButtonText);
}
// Change the text of the "Add to Custom Colors" button
SetWindowText(GetDlgItem(nColorDialogHandle, 0x2C8), sAddToCustomColorsButtonText);
// Change the text of the "Color" label text
oStaticHandleArray[1] = GetDlgItem(nColorDialogHandle, 0x2DA);
SetWindowText(oStaticHandleArray[1], sColorText);
// Change the text of the "Solid" label text
oStaticHandleArray[2] = GetDlgItem(nColorDialogHandle, 0x2DB);
SetWindowText(oStaticHandleArray[2], sSolidText);
// Change the text of the "Hue:" label
oStaticHandleArray[3] = GetDlgItem(nColorDialogHandle, 0x2D3);
SetWindowText(oStaticHandleArray[3], sHueText);
// Change the text of the "Sat:" label
oStaticHandleArray[4] = GetDlgItem(nColorDialogHandle, 0x2D4);
SetWindowText(oStaticHandleArray[4], sSatText);
// Change the text of the "Lum:" label
oStaticHandleArray[5] = GetDlgItem(nColorDialogHandle, 0x2D5);
SetWindowText(oStaticHandleArray[5], sLumText);
// Change the text of the "Red:" label
oStaticHandleArray[6] = GetDlgItem(nColorDialogHandle, 0x2D6);
SetWindowText(oStaticHandleArray[6], sRedText);
// Change the text of the "Green:" label
oStaticHandleArray[7] = GetDlgItem(nColorDialogHandle, 0x2D7);
SetWindowText(oStaticHandleArray[7], sGreenText);
// Change the text of the "Blue:" label
oStaticHandleArray[8] = GetDlgItem(nColorDialogHandle, 0x2D8);
SetWindowText(oStaticHandleArray[8], sBlueText);
// Change the text of the "Custom Colors:" label
SetCustomColorsText(nColorDialogHandle, oStaticHandleArray);
}
return returnValue;
}
private static string GetClassName(IntPtr nHandle)
{
// Create the stringbuilder object that is used to get the window class name from the GetClassName win api function
System.Text.StringBuilder sClassName = new System.Text.StringBuilder(100);
GetClassName(nHandle, sClassName, sClassName.Capacity);
return sClassName.ToString();
}
private static string GetWindowText(IntPtr nHandle)
{
// Create the stringbuilder object that is used to get the window text from the GetWindowText win api function
System.Text.StringBuilder sWindowText = new System.Text.StringBuilder(100);
GetWindowText(nHandle, sWindowText, sWindowText.Capacity);
return sWindowText.ToString();
}
private void SetCustomColorsText(IntPtr nHandle, IntPtr[] oStaticHandleArray)
{
// Find the last control based on the handle to the main window
IntPtr nWorkingHandle = GetWindow(FindWindowEx(nHandle, IntPtr.Zero, null, null), GW_HWNDLAST);
bool bFound = false;
do
{
// Look only for "Static" controls that we have not already changed
if (GetClassName(nWorkingHandle) == "Static" && oStaticHandleArray.Contains(nWorkingHandle) == false)
{
// Found a "Static" control
// Check to see if it is the one we are looking for
string sControlText = GetWindowText(nWorkingHandle);
if (sControlText != "")
{
// Found the "Custom Colors:" label
// Change the text of the "Custom Colors:" label
SetWindowText(nWorkingHandle, sCustomColorsText);
bFound = true;
}
}
// Working backwards we look for the previous control
nWorkingHandle = GetWindow(nWorkingHandle, GW_HWNDPREV);
// Jump out of the loop when the working handle doesn't find anymore controls
if (nWorkingHandle == IntPtr.Zero)
break;
} while (bFound == false);
}
}
}
This dialog is already localized. You can look at it with Visual Studio. Copy c:\windows\system32\en-US\comdlg32.dll.mui to, say, c:\temp\test.dll. Replace "en-US" with your local language tag. In VS use File > Open > File and pick test.dll. You'll see the resources in the MUI file, open the Dialog node and double-click the one named "CHOOSECOLOR". The resource editor opens, you can pick an item in the dialog template and look at its properties in the Property window.
Hopefully it is obvious why the STATIC control has the default IDSTATIC id (65535), there is no need for Windows to do anything to change its properties so no need to find it back. And not for you either, your user will have his own copy of the MUI file that contains the dialog with strings in his native language.
Do note that a machine usually only has MUI files for a single language. If you need to do this to, say, create screenshots for documentation then start here.
I have developed an Application in C# which extract text from external application's textbox , I am using user32.dll, The application is working fine but my problem is this - The external application's textbox contains text in unicode format, so whenever I extract text in my application it shows "??????" text. I have tried setting charset.unicode , and also used RichTextBox to show text in my application.
Please let me know how to exract unicode text from external application.
Here is code I am using
private void button1_Click(object sender, EventArgs e)
{ IntPtr MytestHandle = new IntPtr(0x00060342);
HandleRef hrefHWndTarget = new HandleRef(null, MytestHandle);
// encode text into
richTextBox1.Text = ModApi.GetText(hrefHWndTarget.Handle);
}
public static class ModApi
{
[DllImport("user32.dll", EntryPoint = "SendMessageTimeout", SetLastError = true, CharSet = CharSet.Unicode)]
public static extern uint SendMessageTimeoutText(IntPtr hWnd, int Msg, int countOfChars, StringBuilder text, uint flags, uint uTImeoutj, uint result);
public static string GetText(IntPtr hwnd)
{
var text = new StringBuilder(1024);
if (SendMessageTimeoutText(hwnd, 0xd, 1024, text, 0x2, 1000, 0) != 0)
{
return text.ToString();
}
MessageBox.Show(text.ToString());
return "";
}
}
your use of WN_GETTEXT is not correct read the doc : http://msdn.microsoft.com/en-us/library/windows/desktop/ms632627%28v=vs.85%29.aspx
wParam
The maximum number of characters to be copied, including the terminating null character.
or use a correct function : http://www.pinvoke.net/default.aspx/user32/GetWindowText.html
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, [Out] StringBuilder lParam);
public static string GetWindowTextRaw(IntPtr hwnd)
{
// Allocate correct string length first
int length = (int)SendMessage(hwnd, WM_GETTEXTLENGTH, IntPtr.Zero, IntPtr.Zero);
StringBuilder sb = new StringBuilder(length + 1);
SendMessage(hwnd, WM_GETTEXT, (IntPtr)sb.Capacity, sb);
return sb.ToString();
}
adapt it to SendMessageTimeOut