call user32.dll!GetDC /return native /into hdc (native 0) call gdi32.dll!GetDeviceCaps /return int (slotdata hdc, int 118) call gdi32.dll!GetDeviceCaps /return int (slotdata hdc, int 117)
The first call returns the width, the second gets the height. Or in PowerShell:
Add-Type @"
using System;
using System.Runtime.InteropServices;
public class PInvoke {
[DllImport("user32.dll")] public static extern IntPtr GetDC(IntPtr hwnd);
[DllImport("gdi32.dll")] public static extern int GetDeviceCaps(IntPtr hdc, int nIndex);
}
"@
$hdc = [PInvoke]::GetDC([IntPtr]::Zero)
[PInvoke]::GetDeviceCaps($hdc, 118) # width
[PInvoke]::GetDeviceCaps($hdc, 117) # height
I want to use $hdc further for comparison with a particular height as below but the condition does not seem to work and is always falling in else part. What am I doing wrong here:
ReplyDeleteif(1366 -eq $hdc) {
write-host("Resolution is correct")
}else {
write-host("Resolution is not correct")
}
}
$hdc here is an opaque handle rather than a resolution measurement. You probably want to compare against the "width" and "height" expressions in my last two lines.
Delete