132 lines
4.2 KiB
PowerShell
132 lines
4.2 KiB
PowerShell
function Set-ScreenRefreshRate
|
|
{
|
|
param (
|
|
[Parameter(Mandatory=$true)]
|
|
[int] $Frequency
|
|
)
|
|
|
|
$local:pinvokeCode = @"
|
|
using System;
|
|
using System.Runtime.InteropServices;
|
|
|
|
namespace Display
|
|
{
|
|
[StructLayout(LayoutKind.Sequential)]
|
|
public struct DEVMODE1
|
|
{
|
|
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
|
|
public string dmDeviceName;
|
|
public short dmSpecVersion;
|
|
public short dmDriverVersion;
|
|
public short dmSize;
|
|
public short dmDriverExtra;
|
|
public int dmFields;
|
|
|
|
public short dmOrientation;
|
|
public short dmPaperSize;
|
|
public short dmPaperLength;
|
|
public short dmPaperWidth;
|
|
|
|
public short dmScale;
|
|
public short dmCopies;
|
|
public short dmDefaultSource;
|
|
public short dmPrintQuality;
|
|
public short dmColor;
|
|
public short dmDuplex;
|
|
public short dmYResolution;
|
|
public short dmTTOption;
|
|
public short dmCollate;
|
|
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
|
|
public string dmFormName;
|
|
public short dmLogPixels;
|
|
public short dmBitsPerPel;
|
|
public int dmPelsWidth;
|
|
public int dmPelsHeight;
|
|
|
|
public int dmDisplayFlags;
|
|
public int dmDisplayFrequency;
|
|
|
|
public int dmICMMethod;
|
|
public int dmICMIntent;
|
|
public int dmMediaType;
|
|
public int dmDitherType;
|
|
public int dmReserved1;
|
|
public int dmReserved2;
|
|
|
|
public int dmPanningWidth;
|
|
public int dmPanningHeight;
|
|
};
|
|
|
|
class User_32
|
|
{
|
|
[DllImport("user32.dll")]
|
|
public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode);
|
|
[DllImport("user32.dll")]
|
|
public static extern int ChangeDisplaySettings(ref DEVMODE1 devMode, int flags);
|
|
|
|
public const int ENUM_CURRENT_SETTINGS = -1;
|
|
public const int CDS_UPDATEREGISTRY = 0x01;
|
|
public const int CDS_TEST = 0x02;
|
|
public const int DISP_CHANGE_SUCCESSFUL = 0;
|
|
public const int DISP_CHANGE_RESTART = 1;
|
|
public const int DISP_CHANGE_FAILED = -1;
|
|
}
|
|
|
|
public class PrimaryScreen
|
|
{
|
|
static public string ChangeRefreshRate(int frequency)
|
|
{
|
|
DEVMODE1 dm = GetDevMode1();
|
|
|
|
if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
|
|
{
|
|
dm.dmDisplayFrequency = frequency;
|
|
|
|
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
|
|
|
|
if (iRet == User_32.DISP_CHANGE_FAILED)
|
|
{
|
|
return "Unable to process your request. Sorry for this inconvenience.";
|
|
}
|
|
else
|
|
{
|
|
iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
|
|
switch (iRet)
|
|
{
|
|
case User_32.DISP_CHANGE_SUCCESSFUL:
|
|
{
|
|
return "Success";
|
|
}
|
|
case User_32.DISP_CHANGE_RESTART:
|
|
{
|
|
return "You need to reboot for the change to happen.\n If you feel any problems after rebooting your machine\nThen try to change resolution in Safe Mode.";
|
|
}
|
|
default:
|
|
{
|
|
return "Failed to change the resolution";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return "Failed to change the resolution.";
|
|
}
|
|
}
|
|
|
|
private static DEVMODE1 GetDevMode1()
|
|
{
|
|
DEVMODE1 dm = new DEVMODE1();
|
|
dm.dmDeviceName = new String(new char[32]);
|
|
dm.dmFormName = new String(new char[32]);
|
|
dm.dmSize = (short)Marshal.SizeOf(dm);
|
|
return dm;
|
|
}
|
|
}
|
|
}
|
|
"@ # don't indend this line
|
|
|
|
Add-Type $pinvokeCode -ErrorAction SilentlyContinue
|
|
|
|
[Display.PrimaryScreen]::ChangeRefreshRate($frequency)
|
|
} |