我想写一些有趣的代码在
Windows 7上翻转方向.请参阅我想要控制的选项的屏幕截图.
这是我的代码：
class Program
{
public const long WM_PAINT=0x0F;
public const long WM_DISPLAYCHANGE=0x7E;
[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Auto)]
public struct DEVMODE // taken from Win API
{
...
public System.Windows.Forms.ScreenOrientation dmDisplayOrientation;
}
[DllImport("user32.dll",CharSet=CharSet.Auto)]
public static extern bool EnumDisplaySettings(string lpszDeviceName,int iModeNum,ref DEVMODE lpDevMode);
[DllImport("user32.dll",CharSet=CharSet.Ansi)]
public static extern int ChangeDisplaySettings(ref DEVMODE lpDevMode,int dwFlags);
[DllImport("User32.Dll")]
public static extern long PostMessage(IntPtr hWnd,long wMsg,long wParam,long lParam);
static void Main(string[] args)
{
ScreenOrientation ori=ScreenOrientation.Angle0;
DEVMODE mode=new DEVMODE()
{
dmSize=(short)Marshal.SizeOf(typeof(DEVMODE)),dmDriverExtra=0,dmDeviceName=new string(new char[32]),dmFormName=new string(new char[32]),};
try
{
EnumDisplaySettings(null,-1,ref mode);
if((mode.dmFields&0x80)>0)
{
ori=mode.dmDisplayOrientation;
}
mode.dmDisplayOrientation=ScreenOrientation.Angle270;
int temp=mode.dmPelsWidth;
mode.dmPelsWidth=mode.dmPelsHeight;
mode.dmPelsHeight=temp;
int ret=ChangeDisplaySettings(ref mode,0);
PostMessage(Process.GetCurrentProcess().Handle,WM_DISPLAYCHANGE,0);
...
}
catch
{
}
}
}
哪个运行,但不会产生任何影响.
参考代码：http://justlikeamagic.com/2009/05/21/changing-display-settings-programmatically/
和http://msdn.microsoft.com/en-us/library/ms812499.aspx#tbconchgscrn_chngingdisplay
解决方法
我已经开始了.
它包含Win7的必要结构,因此您可以调用SetDisplayConfig和其他函数.
一个实际的例子,如何将显示器旋转90度：
int numPathArrayElements;
int numModeInfoArrayElements;
const QueryDisplayFlags pathType = QueryDisplayFlags.OnlyActivePaths;
// query active paths from the current computer.
// note that 0 is equal to SUCCESS!
// TODO; HARDCODE MAGIC VALUES AWAY.
if (CCDWrapper.GetDisplayConfigBufferSizes(pathType,out numPathArrayElements,out numModeInfoArrayElements) == 0)
{
var pathInfoArray = new DisplayConfigPathInfo[numPathArrayElements];
var modeInfoArray = new DisplayConfigModeInfo[numModeInfoArrayElements];
// TODO; FALLBACK MECHANISM THAT HANDLES DIFFERENT VALUES FOR ZERO.
if (CCDWrapper.QueryDisplayConfig(
pathType,ref numPathArrayElements,pathInfoArray,ref numModeInfoArrayElements,modeInfoArray,IntPtr.Zero) == 0)
{
pathInfoArray[0].targetInfo.rotation = DisplayConfigRotation.Rotate90;
CCDWrapper.SetDisplayConfig((uint) numPathArrayElements,(uint) numModeInfoArrayElements,SdcFlags.Apply | SdcFlags.UseSuppliedDisplayConfig);
}
}
它现在是原始的,这意味着现在没有“C#style”API,但是,你可以使用这些结构.
