how does movemouse work?

[alejo9010]

hello, im triying to make this work to move mouse to relative window coord, so i got this

        public async void SetCursorPosition(Point p)
        {
            await Delay(500);
            Rectangle rect;
                NativeMethods.GetWindowRect(process.MainWindowHandle, out rect);
            p.X = p.X + rect.Left;
            p.Y = p.Y + rect.Top;
            simulator.Mouse.MoveMouseTo(Convert.ToDouble(p.X), Convert.ToDouble(p.Y));
        }

but the mouse is off by alot from the actual Point where it should move, i debug the app, and the coords are correct. any idea what happen ?

[Gh0stWalk3r]

Hello @alejo9010
the first thing that comes to my mind is that a DPI setting might throw it off the actual coordinates.
Can you tell me a bit more of your system/screen settings, like what OS are you using, do you have DPI scaling activated (which value is it set to), what are the given values and what is the actual result?
I wish you a nice day 😄 ,
Gregor

[BigIan1969]

I'm seeing this issue too. On a Win 10 VM (Virtualbox) no DPI Scaling I'm trying to click on a control that's pretty much in the middle of the screen but it's clicking on VS's System menu which is top left my actual mouse pointer was somewhere completely different and didn't move throughout execution.

[Gh0stWalk3r]

Hello @BigIan1969 ,
can you tell me a bit more about the execution/setup? In general I would like to know how the setup looks like and how you interact with it, so that I get a better picture of the issue.

• Is the library/app used inside or outside the VM?
• How do you interact with the VM, e.g. via Remote Desktop or via the Virtual Box-Guest Machine Viewer (I do not know the exact name for that 😅)?
• Are VirtualBox Guest Additions/VM-Tools installed?
• Can you give me the details of the screen settings of the VM (and when it is run outside the VM please also from the host), by running the following two scripts in PowerShell (copied from osdeploy.com):
  HINT: PowerShell ISE might give different results, therefore please run it in the normal PowerShell or Windows Terminal.

Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.SystemInformation]::VirtualScreen

and

Add-Type @'
using System; 
using System.Runtime.InteropServices;
using System.Drawing;

public class DPI {  
  [DllImport("gdi32.dll")]
  static extern int GetDeviceCaps(IntPtr hdc, int nIndex);

  public enum DeviceCap {
  VERTRES = 10,
  DESKTOPVERTRES = 117
  } 

  public static float scaling() {
  Graphics g = Graphics.FromHwnd(IntPtr.Zero);
  IntPtr desktop = g.GetHdc();
  int LogicalScreenHeight = GetDeviceCaps(desktop, (int)DeviceCap.VERTRES);
  int PhysicalScreenHeight = GetDeviceCaps(desktop, (int)DeviceCap.DESKTOPVERTRES);

  return (float)PhysicalScreenHeight / (float)LogicalScreenHeight;
  }
}
'@ -ReferencedAssemblies 'System.Drawing.dll' -ErrorAction Stop
Return [DPI]::scaling() * 100