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Notes.txt
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/*
[Flags()]
public enum DisplayDeviceStateFlags : int
{
AttachedToDesktop = 0x1,
MultiDriver = 0x2,
PrimaryDevice = 0x4,
MirroringDriver = 0x8,
VGACompatible = 0x10,
Removable = 0x20,
ModesPruned = 0x8000000,
Remote = 0x4000000,
Disconnect = 0x2000000
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct DISPLAY_DEVICE
{
[MarshalAs(UnmanagedType.U4)]
public int cb;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string DeviceName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceString;
[MarshalAs(UnmanagedType.U4)]
public DisplayDeviceStateFlags StateFlags;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceID;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceKey;
}
internal enum DMCOLOR : short
{
DMCOLOR_UNKNOWN = 0,
DMCOLOR_MONOCHROME = 1,
DMCOLOR_COLOR = 2
}
internal enum DMCOLLATE : short
{
DMCOLLATE_FALSE = 0,
DMCOLLATE_TRUE = 1
}
internal enum DM : short
{
DMDUP_UNKNOWN = 0,
DMDUP_SIMPLEX = 1,
DMDUP_VERTICAL = 2,
DMDUP_HORIZONTAL = 3
}
struct POINTL
{
public Int32 x;
public Int32 y;
}
[StructLayout(LayoutKind.Explicit, CharSet = CharSet.Ansi)]
struct DEVMODE
{
public const int CCHDEVICENAME = 32;
public const int CCHFORMNAME = 32;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHDEVICENAME)]
[System.Runtime.InteropServices.FieldOffset(0)]
public string dmDeviceName;
[System.Runtime.InteropServices.FieldOffset(32)]
public Int16 dmSpecVersion;
[System.Runtime.InteropServices.FieldOffset(34)]
public Int16 dmDriverVersion;
[System.Runtime.InteropServices.FieldOffset(36)]
public Int16 dmSize;
[System.Runtime.InteropServices.FieldOffset(38)]
public Int16 dmDriverExtra;
[System.Runtime.InteropServices.FieldOffset(40)]
public DM dmFields;
[System.Runtime.InteropServices.FieldOffset(44)]
Int16 dmOrientation;
[System.Runtime.InteropServices.FieldOffset(46)]
Int16 dmPaperSize;
[System.Runtime.InteropServices.FieldOffset(48)]
Int16 dmPaperLength;
[System.Runtime.InteropServices.FieldOffset(50)]
Int16 dmPaperWidth;
[System.Runtime.InteropServices.FieldOffset(52)]
Int16 dmScale;
[System.Runtime.InteropServices.FieldOffset(54)]
Int16 dmCopies;
[System.Runtime.InteropServices.FieldOffset(56)]
Int16 dmDefaultSource;
[System.Runtime.InteropServices.FieldOffset(58)]
Int16 dmPrintQuality;
[System.Runtime.InteropServices.FieldOffset(44)]
public POINTL dmPosition;
[System.Runtime.InteropServices.FieldOffset(52)]
public Int32 dmDisplayOrientation;
[System.Runtime.InteropServices.FieldOffset(56)]
public Int32 dmDisplayFixedOutput;
[System.Runtime.InteropServices.FieldOffset(60)]
public short dmColor; // See note below!
[System.Runtime.InteropServices.FieldOffset(62)]
public short dmDuplex; // See note below!
[System.Runtime.InteropServices.FieldOffset(64)]
public short dmYResolution;
[System.Runtime.InteropServices.FieldOffset(66)]
public short dmTTOption;
[System.Runtime.InteropServices.FieldOffset(68)]
public short dmCollate; // See note below!
[System.Runtime.InteropServices.FieldOffset(70)]
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHFORMNAME)]
public string dmFormName;
[System.Runtime.InteropServices.FieldOffset(102)]
public Int16 dmLogPixels;
[System.Runtime.InteropServices.FieldOffset(104)]
public Int32 dmBitsPerPel;
[System.Runtime.InteropServices.FieldOffset(108)]
public Int32 dmPelsWidth;
[System.Runtime.InteropServices.FieldOffset(112)]
public Int32 dmPelsHeight;
[System.Runtime.InteropServices.FieldOffset(116)]
public Int32 dmDisplayFlags;
[System.Runtime.InteropServices.FieldOffset(116)]
public Int32 dmNup;
[System.Runtime.InteropServices.FieldOffset(120)]
public Int32 dmDisplayFrequency;
}
enum DISP_CHANGE : int
{
Successful = 0,
Restart = 1,
Failed = -1,
BadMode = -2,
NotUpdated = -3,
BadFlags = -4,
BadParam = -5,
BadDualView = -6
}
public enum ChangeDisplaySettingsFlags : uint
{
CDS_NONE = 0,
CDS_UPDATEREGISTRY = 0x00000001,
CDS_TEST = 0x00000002,
CDS_FULLSCREEN = 0x00000004,
CDS_GLOBAL = 0x00000008,
CDS_SET_PRIMARY = 0x00000010,
CDS_VIDEOPARAMETERS = 0x00000020,
CDS_ENABLE_UNSAFE_MODES = 0x00000100,
CDS_DISABLE_UNSAFE_MODES = 0x00000200,
CDS_RESET = 0x40000000,
CDS_RESET_EX = 0x20000000,
CDS_NORESET = 0x10000000
}
[DllImport("user32.dll")]
static extern DISP_CHANGE ChangeDisplaySettingsEx(string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd, ChangeDisplaySettingsFlags dwflags, IntPtr lParam);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern bool EnumDisplayDevices(string lpDevice, uint iDevNum, ref DISPLAY_DEVICE lpDisplayDevice, uint dwFlags);
[DllImport("user32.dll")]
static extern bool EnumDisplaySettingsEx(string lpszDeviceName, uint iModeNum, out DEVMODE lpDevMode, uint dwFlags);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
private void SwitchToDevice(int i)
{
string devices="";
DISPLAY_DEVICE d = new DISPLAY_DEVICE();
d.cb = Marshal.SizeOf(d);
try
{
for (uint id = 0; EnumDisplayDevices(null, id, ref d, 0); id++)
{
devices+=(
String.Format("{0}, {1}, {2}, {3}, {4}, {5}, {6}",
id,
d.DeviceName,
d.DeviceString,
d.StateFlags,
d.DeviceID,
d.DeviceKey,
d.cb
)
+"\r\n");
d.cb = Marshal.SizeOf(d);
var disp = new DispSet();
if (EnumDisplaySettings("\\\\.\\Display"+id, -2, ref disp) == 0)
{
devices += (
String.Format("{0}, {1}, {2}",
disp.width,
disp.height,
disp.frequency
)
+ "\r\n");
}
}
}
catch (Exception ex)
{
devices+=(String.Format("{0}", ex.ToString()+"\r\n"));
}
MessageBox.Show(devices);
/*DISPLAY_DEVICE d = new DISPLAY_DEVICE();
DEVMODE dm = new DEVMODE();
d.cb = Marshal.SizeOf(d);
int deviceID = 1; // This is only for my device setting. Go through the whole EnumDisplayDevices to find your device
EnumDisplayDevices(null, id, ref d, 0); //
EnumDisplaySettings(d.DeviceName, 0, ref dm);
dm.dmPelsWidth = 1024;
dm.dmPelsHeight = 768;
dm.dmPositionX = Screen.PrimaryScreen.Bounds.Right;
dm.dmFields = DM.Position | DM.PelsWidth | DM.PelsHeight;
ChangeDisplaySettingsEx(d.DeviceName, ref dm, IntPtr.Zero, CDS_UPDATEREGISTRY, IntPtr.Zero);
}*/