public void ChangeResolution(int a, int b)
{
int iWidth = a;
int iHeight = b;
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
{
dm.dmPelsWidth = iWidth;
dm.dmPelsHeight = iHeight;
int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
if (iRet == User_32.DISP_CHANGE_FAILED)
{
MessageBox.Show("Unable to process your request");
MessageBox.Show("Description: Unable To Process Your Request. Sorry For This Inconvenience.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
switch (iRet)
{
case User_32.DISP_CHANGE_SUCCESSFUL:
{
break;
}
case User_32.DISP_CHANGE_RESTART:
{
MessageBox.Show("Description: You Need To Reboot For The Change To Happen.\n If You Feel Any Problem After Rebooting Your Machine\nThen Try To Change Resolution In Safe Mode.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
}
default:
{
MessageBox.Show("Description: Failed To Change The Resolution.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
}
}
}
}
}
public static extern int ChangeDisplaySettings(ref DEVMODE1 devMode, int flags);
public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode);
