using System; using System.Runtime.InteropServices; using System.Drawing; using System.Windows.Forms; namespace Win32APIs { public class APIs { public const int WM_PRINT = 0x0317; public const int WM_PRINTCLIENT = 0x0318; public const int PRF_CHECKVISIBLE = 0x00000001; public const int PRF_NONCLIENT = 0x00000002; public const int PRF_CLIENT = 0x00000004; public const int PRF_ERASEBKGND = 0x00000008; public const int PRF_CHILDREN = 0x00000010; public const int PRF_OWNED = 0x00000020; public const int SW_SHOWNOACTIVATE = 4; public const int HWND_TOPMOST = -1; public const uint SWP_NOACTIVATE = 0x0010; public enum TernaryRasterOperations { BLACKNESS = 0x42, DSTINVERT = 0x550009, MERGECOPY = 0xc000ca, MERGEPAINT = 0xbb0226, NOTSRCCOPY = 0x330008, NOTSRCERASE = 0x1100a6, PATCOPY = 0xf00021, PATINVERT = 0x5a0049, PATPAINT = 0xfb0a09, SRCAND = 0x8800c6, SRCCOPY = 0xcc0020, SRCERASE = 0x440328, SRCINVERT = 0x660046, SRCPAINT = 0xee0086, WHITENESS = 0xff0062 } [DllImport("USER32.DLL")] public static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam); [DllImport("user32.dll")] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", SetLastError = true)] public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow); [DllImport("user32.dll", SetLastError = true)] public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, IntPtr windowTitle); [DllImport("user32.dll")] public static extern int GetWindowRect(IntPtr hwnd, out RECT rc); [DllImport("user32.dll", EntryPoint = "SetWindowPos")] static extern bool SetWindowPos( int hWnd, // window handle int hWndInsertAfter, // placement-order handle int X, // horizontal position int Y, // vertical position int cx, // width int cy, // height uint uFlags); // window positioning flags [DllImport("user32.dll")] static extern bool ShowWindow(IntPtr hWnd, int nCmdShow); [DllImport("gdi32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)] public static extern bool BitBlt(IntPtr hdc, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, TernaryRasterOperations dwRop); [StructLayout(LayoutKind.Sequential)] public struct RECT { public int Left; public int Top; public int Right; public int Bottom; } public static void ShowInactiveTopmost(IntPtr FormHandle) { ShowWindow(FormHandle, SW_SHOWNOACTIVATE); } public class ControlToImage { private static Bitmap GetImage(Graphics formg, int w, int h, int yOffset) { Bitmap image = new Bitmap(w, h - yOffset); Graphics graphics = Graphics.FromImage(image); IntPtr hdc = formg.GetHdc(); IntPtr ptr2 = graphics.GetHdc(); try { APIs.BitBlt(ptr2, 0, 0, w, h - yOffset, hdc, 0, yOffset, APIs.TernaryRasterOperations.SRCCOPY); } catch (Exception exception1) { } finally { try { formg.ReleaseHdc(hdc); } catch (Exception exception2) { } try { graphics.ReleaseHdc(ptr2); } catch (Exception exception3) { } } return image; } public static Image GetControlScreenshot(System.Windows.Forms.Control control) { object x = new object(); Bitmap bitmap = null; lock (control) { if (control == null || control.Handle == IntPtr.Zero) return (Image)bitmap; if (control.Width < 1 || control.Height < 1) return (Image)bitmap; if (bitmap != null) bitmap.Dispose(); // preparing the bitmap. bitmap = new Bitmap(control.Width, control.Height); bitmap = GetImage(control.CreateGraphics(), control.Width, control.Height, 0); } return (Image)bitmap; } //public static Image CaptureControlImage(AxMSTSCLib.AxMsRdpClient2 ctrl) //{ // //Bitmap bmp = new Bitmap(ctrl.Width, ctrl.Height); // //Graphics gBmp = Graphics.FromImage(bmp); // //IntPtr dcBmp = gBmp.GetHdc(); // //SendMessage(ctrl.Handle, WM_PRINT, dcBmp, PRF_CLIENT | PRF_CHILDREN | PRF_NONCLIENT | PRF_OWNED); // //gBmp.ReleaseHdc(dcBmp); // Image ret = null; // Bitmap bmp = new Bitmap(ctrl.Width, ctrl.Height); ; // IntPtr p_hWnd = ctrl.Handle; // IntPtr hWnd = APIs.FindWindowEx(p_hWnd, IntPtr.Zero, "UIMainClass", IntPtr.Zero); // if (hWnd != IntPtr.Zero) // { // hWnd = APIs.FindWindowEx(hWnd, IntPtr.Zero, "UIContainerClass", IntPtr.Zero); // if (hWnd != IntPtr.Zero) // { // hWnd = APIs.FindWindowEx(hWnd, IntPtr.Zero, "OPWindowClass", "Output Painter Window"); // if (hWnd != IntPtr.Zero) // { // //Graphics gBmp = Graphics.FromHwnd(hWnd); // //APIs.RECT r = new APIs.RECT(); // //APIs.GetWindowRect(hWnd, out r); // //ret = GetImage(gBmp, r.Right, r.Bottom, 0); // ////IntPtr dcBmp = gBmp.GetHdc(); // ////IntPtr param = new IntPtr(APIs.PRF_CLIENT | APIs.PRF_CHILDREN | APIs.PRF_NONCLIENT); // ////APIs.SendMessage(ctrl.Handle, APIs.WM_PRINT, dcBmp, param); // ////gBmp.ReleaseHdc(dcBmp); // ////ret = (Image)bmp; // ////ScreenCapture sc = new ScreenCapture(); // ////ret = sc.CaptureWindow(hWnd); // } // } // } // return ret; //} } } }