public Boolean changeDisplaySettings(int X, int Y, int refresh, int orientation)
{
DEVMODE1[] arDM = getSupportedModes();
if (arDM != null && arDM.Length > 0)
{
for (int i = 0; i < arDM.Length; i++)
{
if (arDM[i].dmPelsWidth == X && arDM[i].dmPelsHeight == Y && arDM[i].dmDisplayFrequency == refresh && arDM[i].dmOrientation == orientation)
{
DEVMODE1 dmset = new DEVMODE1();
dmset.dmDeviceName = new String(new char[32]);
dmset.dmFormName = new String(new char[32]);
dmset.dmSize = (short)Marshal.SizeOf(dmset);
if (UnmanagedWin32.EnumDisplaySettings(null, UnmanagedWin32.ENUM_CURRENT_SETTINGS, ref dmset) != 0)
{
dmset.dmPelsWidth = X;
dmset.dmPelsHeight = Y;
dmset.dmOrientation = (short)orientation;
dmset.dmDisplayFrequency = refresh;
int intTest = UnmanagedWin32.ChangeDisplaySettings(ref dmset, UnmanagedWin32.CDS_TEST);
if (intTest != UnmanagedWin32.DISP_CHANGE_FAILED)
{
intTest = UnmanagedWin32.ChangeDisplaySettings(ref dmset, UnmanagedWin32.CDS_UPDATEREGISTRY);
if (intTest == UnmanagedWin32.DISP_CHANGE_SUCCESSFUL)
{
return(true);
}
else if (intTest == UnmanagedWin32.DISP_CHANGE_RESTART)
{
return(true);
}
}
}
}
}
}
return(false);
}
public DEVMODE1[] getSupportedModes()
{
ArrayList alModes = new ArrayList();
int intRet = 1;
int intNum = 0;
while (intRet != 0)
{
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
intRet = UnmanagedWin32.EnumDisplaySettings(null, intNum++, ref dm);
if (intRet != 0)
{
alModes.Add(dm);
}
}
return((DEVMODE1[])(alModes.ToArray(typeof(DEVMODE1))));
}
public static extern int ChangeDisplaySettings(ref DEVMODE1 devMode, int flags);
public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode);
public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode);
public static extern int ChangeDisplaySettings(ref DEVMODE1 devMode, int flags);
public DEVMODE1[] getSupportedModes()
{
ArrayList alModes = new ArrayList();
int intRet = 1;
int intNum = 0;
while (intRet != 0)
{
DEVMODE1 dm = new DEVMODE1();
dm.dmDeviceName = new String(new char[32]);
dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
intRet = UnmanagedWin32.EnumDisplaySettings(null, intNum++, ref dm);
if (intRet != 0)
{
alModes.Add(dm);
}
}
return (DEVMODE1[])(alModes.ToArray(typeof(DEVMODE1)));
}
public Boolean changeDisplaySettings(int X, int Y, int refresh, int orientation)
{
DEVMODE1[] arDM = getSupportedModes();
if (arDM != null && arDM.Length > 0)
{
for (int i = 0; i < arDM.Length; i++)
{
if (arDM[i].dmPelsWidth == X && arDM[i].dmPelsHeight == Y && arDM[i].dmDisplayFrequency == refresh && arDM[i].dmOrientation == orientation)
{
DEVMODE1 dmset = new DEVMODE1();
dmset.dmDeviceName = new String(new char[32]);
dmset.dmFormName = new String(new char[32]);
dmset.dmSize = (short)Marshal.SizeOf(dmset);
if (UnmanagedWin32.EnumDisplaySettings(null, UnmanagedWin32.ENUM_CURRENT_SETTINGS, ref dmset) != 0)
{
dmset.dmPelsWidth = X;
dmset.dmPelsHeight = Y;
dmset.dmOrientation = (short)orientation;
dmset.dmDisplayFrequency = refresh;
int intTest = UnmanagedWin32.ChangeDisplaySettings(ref dmset, UnmanagedWin32.CDS_TEST);
if (intTest != UnmanagedWin32.DISP_CHANGE_FAILED)
{
intTest = UnmanagedWin32.ChangeDisplaySettings(ref dmset, UnmanagedWin32.CDS_UPDATEREGISTRY);
if (intTest == UnmanagedWin32.DISP_CHANGE_SUCCESSFUL)
return true;
else if (intTest == UnmanagedWin32.DISP_CHANGE_RESTART)
return true;
}
}
}
}
}
return false;
}
