更改屏幕分辨率

[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern int ChangeDisplaySettings([In] ref DEVMODE lpDevMode, int dwFlags);
 
public enum DMDO
{
    DEFAULT = 0,
    D90 = 1,
    D180 = 2,
    D270 = 3
}
 
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
struct DEVMODE
{
    public const int DM_DISPLAYFREQUENCY = 0x400000;
    public const int DM_PELSWIDTH = 0x80000;
    public const int DM_PELSHEIGHT = 0x100000;
    public const int DM_BITSPERPEL = 262144;
    private const int CCHDEVICENAME = 32;
    private const int CCHFORMNAME = 32;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHDEVICENAME)]
    public string dmDeviceName;
    public short dmSpecVersion;
    public short dmDriverVersion;
    public short dmSize;
    public short dmDriverExtra;
    public int dmFields;
    public int dmPositionX;
    public int dmPositionY;
    public DMDO dmDisplayOrientation;
    public int dmDisplayFixedOutput;
    public short dmColor;
    public short dmDuplex;
    public short dmYResolution;
    public short dmTTOption;
    public short dmCollate;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHFORMNAME)]
    public string dmFormName;
    public short dmLogPixels;
    public int 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;

}

调用方法：

long RetVal = 0;
DEVMODE dm = new DEVMODE();
dm.dmSize = (short)Marshal.SizeOf(typeof(DEVMODE));
dm.dmPelsWidth = 1024;//宽
dm.dmPelsHeight = 768;//高
dm.dmDisplayFrequency = 60;//刷新率
dm.dmFields = DEVMODE.DM_PELSWIDTH | DEVMODE.DM_PELSHEIGHT | DEVMODE.DM_DISPLAYFREQUENCY | DEVMODE.DM_BITSPERPEL;
RetVal = ChangeDisplaySettings(ref dm, 0);