I want to get correct data from my code when screen scaling is enabled. So i'm using SetProcessDPIAware() function:
using namespace System.Windows.Forms
Clear-Host
Add-Type -AssemblyName System.Windows.Forms
Add-Type -Name User32 -Namespace W32 '
[DllImport("user32.dll")]
public static extern bool SetProcessDPIAware();'
[Cursor]::Position | Write-Host
[Screen]::PrimaryScreen.Bounds.Size | Write-Host
[SystemInformation]::PrimaryMonitorSize | Write-Host
[W32.User32]::SetProcessDPIAware()
[Cursor]::Position | Write-Host
[Screen]::PrimaryScreen.Bounds.Size | Write-Host
[SystemInformation]::PrimaryMonitorSize | Write-Host
Output:
{X=630,Y=313} # ❌ incorrect data
{Width=2048, Height=864} # ❌ incorrect data
{Width=2048, Height=864} # ❌ incorrect data
True
{X=788,Y=391} # ✔️ data became correct
{Width=2048, Height=864} # ❌ still incorrect data
{Width=2560, Height=1080} # ✔️ data became correct
The same situation with c# code:
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class Class1
{
[DllImport("user32.dll")]
static extern bool SetProcessDPIAware();
public static void Main()
{
Console.WriteLine("\n");
Console.WriteLine(Cursor.Position);
Console.WriteLine(Screen.PrimaryScreen.Bounds.Size);
Console.WriteLine(SystemInformation.PrimaryMonitorSize);
Console.WriteLine(SetProcessDPIAware());
Console.WriteLine(Cursor.Position);
Console.WriteLine(Screen.PrimaryScreen.Bounds.Size);
Console.WriteLine(SystemInformation.PrimaryMonitorSize);
}
}
So is this a bug of Screen.PrimaryScreen.Bounds
or i have to do something else to get correct data from this property?
And if the only way is to use the SystemInformation
class, then how do I get data about the second monitor, not only about the Primary one?
OR Is there a way to set this setting for powershell.exe / powershell_ise.exe ?
This is what I use and works for me:
Add-Type -TypeDefinition @'
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 -IgnoreWarnings -WarningAction Ignore
Then you can call this class and get the DPI like:
$DPI = [math]::round([dpi]::scaling(), 2) * 100
$bounds = [System.Windows.Forms.Screen]::PrimaryScreen.WorkingArea
$bounds.Width = ($bounds.Width / 100) * $DPI
$bounds.Height = ($bounds.Height / 100) * $DPI
And lastly, always use relative sizes like:
$form.Size = [System.Drawing.Size]::new(($bounds.Width / X),($bounds.Height / X))
$form.Add_Resize({
$txtBox.Size = [System.Drawing.Size]::new(($this.Width - X), XX)
})
And so on, where X
can be an int
or double
.
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