Develop Reference

Setting cursor position in WPF only works sometimes

I am working on a WPF application and want to set the cursor position to the corner of the screen.
I tried using the WinForms approach:
System.Windows.Forms.Cursor.Position = new System.Drawing.Point(0, 0);
and the user32.dll approach:
[System.Runtime.InteropServices.DllImport("User32.dll")]
private static extern bool SetCursorPos(int X, int Y);
The WinForms approach worked sometimes, but I don't understand why it worked and didn't work sometimes. I made sure the code is actually being called. The user32.dll approach didn't work for me at all.

Simple solution is make your application enough big and move mouse inside of it.
http://www.aspdotnet-pools.com/2017/10/move-mouse-cursor-automatically-c.html
To move mouse outside your application you need global mouse hook.
Global mouse event handler

I'm trying to make an overlay with XNA. Having troubles making it transparent

No matter what i do, i cant figure out how to make an XNA game fully transparent.
http://vitrite.vanmiddlesworth.org/vitrite/shot-full.png
here is an example of what i mean. In that the command prompt is partially transparent and im trying to do that myself.
Is it even possible in XNA?

That's very difficult to make it truly transparent without using an interface which XNA does not support due to its D3D version, but there are workarounds that sort of get what you want.
You can get similar appearance by hooking into the Windows API and grabbing an image of the last rendered "client area" of the window (the desktop is just a special window). In your case you could get all other windows that yours was overlapping, grab the client areas, clip them using your relative position/size, then mix them together in a shader. Warning: This could be performance-intensive on update, depending on how many windows you had "beneath" your own. I suggest hooking into updates from the window so you're only capturing when there's a change or when your window moves, etc.
Check out these in the Windows API:
[DllImport("user32.dll")]
public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
[DllImport("user32.dll")]
public static extern bool PrintWindow(IntPtr hWnd, IntPtr hdcBlt, int nFlags);
Be aware that this will not help give your window border any faked transparency though, only your render area.
Also see: Transparent window layer that is click-through and always stays on top
You might be able to use some of the information in that thread as well.

set Cursor to desired point c#

Im trying to move my cursor according to my hand point in kinect, I can get the real coordinates I mean I can move an image on screen but I want real cursor to be settled according to my hand coordinates. I tried Console.SetCursor(x,y) but it gives exception I also tried to download windows forms dll but I cant find the version 4.00 . Is there any simple way to set cursor in a desired position? (which is working by the way and as I said Console.SetcursorPosition is not wodking?)

You didn't provide very much information about you app but I suspect that you just need to assign to Cursor.Position from System.Windows.Forms. You may need to add a reference to System.Windows.Forms in order to gain access to this, depending on exactly what type of project you have.
If you want to keep it lightweight and avoid taking a reference to WinForms then you could just pinvoke to SetCursorPos.
[DllImport("user32.dll")]
static extern bool SetCursorPos(int X, int Y);

Just use
Cursor.Position = new Point();
You can find more information's here

Thank you for question and answer.
I found strange and unobvious behavior.
Let you use multi-monitor (two or three monitor) configuration, and use two windows in your application.
One window is active, and you set cursor position for second windows.
And this two windows located on different monitors.
Then, you need call SetCursorPos TWICE!
TWICE, who would have thought?
Firs call move cursor to virtual borderline between monitors.
And only second call move cursor to required position second window!
Example of code (after 6 hours of experiments):
SetForegroundWindow(this.Handle); // set second window active
SendMessage(this.Handle, 0x20, this.Handle, (IntPtr)1); // Send WM_SETCURSOR
SetCursorPos(400, 600);
Thread.Sleep(50);
SetCursorPos(400, 600);

How to check current mouse button state using Win32/User32 library?

I know how to stimulate clicks using User32 SendInput method and what I need is a similar User32 method but to obtain the current mouse button state.
Something similar to:
public static extern bool GetCursorPos(ref System.Drawing.Point lpPoint);
Function GetCursorPos gives me the current cursor position. What I need is the left button state (if it's clicked or not). Is there such a function?

Use GetAsyncKeyState, To Quote MSDN:
The GetAsyncKeyState function works
with mouse buttons. However, it checks
on the state of the physical mouse
buttons, not on the logical mouse
buttons that the physical buttons are
mapped to. For example, the call
GetAsyncKeyState(VK_LBUTTON) always
returns the state of the left physical
mouse button, regardless of whether it
is mapped to the left or right logical
mouse button. You can determine the
system's current mapping of physical
mouse buttons to logical mouse buttons
by calling
GetSystemMetrics(SM_SWAPBUTTON).

There's a method called GetAsyncKeyState. The method signature looks like this:
[DllImport("user32.dll")]
public static extern short GetAsyncKeyState(UInt16 virtualKeyCode);
Then you simply call it passing the left mouse key code (VK_LBUTTON = 0x01) and off you go.
More information directly from MSDN.

Programaticly Move Mouse in VMWare C#

I'm writing a toy application that plays with the mouse cursor, and I'm trying to move it programmticly. Using either Cursor.Position = ... or Win32 interop calls work fine on a normal machine, but I'm having difficulties getting it to work under VMWare.
Does anyone have any suggestions?
EDIT
To clarify:
I've got a small windows forms application I've made running inside the VM, it has one button on it, when clicked it is supposed to move the mouse cursor inside the VM. I've used both the Cursor.Position method and the approach that Wolf5 has suggested.

Try this instead:
[DllImport("user32", SetLastError = true)]
private static extern int SetCursorPos(int x, int y);
public static void SetMousePos(Point p) {
SetMousePos(p.X, p.Y);
}
public static void SetMousePos(int x, int y) {
SetCursorPos(x, y);
}
Of course you will have to make sure VMWARE has focus in the first place since it cannot set the mouse position of your mouse outside VMWARE.

Don't focus the VM with your real mouse. Or uninstall the VMWare mouse driver so the VM doesn't get the focus unless you click inside it.

I have resolved the issue.
In a desperate attempt to try anything i finally gave up and un-installed the mouse driver from the VM. After a reboot, my toy application works.
The device was listed as a VMWare Pointing device, after the reboot it's coming up as an "unknown device", but the mouse still works. Albeit I a little on the nippy side.