C# 获取桌面
[System.Runtime.InteropServices.DllImport(”gdi32.dll”)] public static extern int BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, UInt32 dwRop); //创建桌面句柄 [System.Runtime.InteropServices.DllImportAttribute(”gdi32.dll”)] public static extern IntPtr CreateDC(string lpszDriver, string lpszDevice, string lpszOutput, int lpInitData); [System.Runtime.InteropServices.DllImport(”gdi32.dll”)] public static extern IntPtr CreateCompatibleDC(IntPtr hdc); //转换为本地的图像资源 [System.Runtime.InteropServices.DllImport(”gdi32.dll”)] public static extern IntPtr CreateCompatibleBitmap(IntPtr hdc, int nWidth, int nHeight); [System.Runtime.InteropServices.DllImport(”gdi32.dll”)] public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj); [System.Runtime.InteropServices.DllImport(”gdi32.dll”)] public static extern int DeleteDC(IntPtr hdc); //释放用过的设备句柄 [DllImport(”user32.dll”)] public static extern bool ReleaseDC( IntPtr hwnd, IntPtr hdc ); //释放用过的画笔等资源 [DllImport(”gdi32.dll”)] public static extern bool DeleteObject( IntPtr hdc ); /// <summary> /// 截取屏幕图像 /// </summary> /// <param name=”Width”>宽</param> /// <param name=”Height”>高</param> /// <param name=”x”>x坐标(全屏时候为0)</param> /// <param name=”y”>y坐标(全屏时候为0)</param> /// <returns></returns> public Bitmap fullphoto(int Width,int Height,int x,int y) { Bitmap bitmap; //try //{ IntPtr hScreenDc = CreateDC(”DISPLAY”, null, null, 0); // 创建桌面句柄 IntPtr hMemDc = CreateCompatibleDC(hScreenDc); // 创建与桌面句柄相关连的内存DC IntPtr hBitmap = CreateCompatibleBitmap(hScreenDc, Width, Height); IntPtr hOldBitmap = SelectObject(hMemDc, hBitmap); BitBlt(hMemDc, x, y, Width, Height, hScreenDc, x, y, (UInt32)0xcc0020); IntPtr map = SelectObject(hMemDc, hOldBitmap); bitmap = Bitmap.FromHbitmap(map); ReleaseDC(hBitmap, hScreenDc); DeleteDC(hScreenDc);//删除用过的对象 DeleteDC(hMemDc);//删除用过的对象 DeleteDC(hOldBitmap); DeleteObject(hBitmap); //} //catch (Exception wx) //{ // return null; //} // number= number +1; // bitmap.Save(”screen” + number + “.bmp”); return bitmap; }