public ChartArea(Control parent)
        {
            Parent      = parent;
            Left        = 0;
            Top         = 0;
            base.Height = 10;
            base.Width  = 10;

            IntPtr hDC = WinApi.GetDC(Handle);

            bDC       = WinApi.CreateCompatibleDC(hDC);
            bitmapGDI = WinApi.CreateCompatibleBitmap(hDC, Height, Width);
            oldBitmap = WinApi.SelectObject(bDC, bitmapGDI);
            WinApi.ReleaseDC(Handle, hDC);
        }
Exemple #2
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        public static Bitmap GetBitmapWindowClient(IntPtr handle)
        {
            try
            {
                // get te hDC of the target window
                IntPtr hdcSrc = WinApi.GetWindowDC(handle);
                // get the size
                //RECT windowRect;
                //WinApi.GetWindowRect(handle, out windowRect);
                //int width = windowRect.Right - windowRect.Left;
                //int height = windowRect.Bottom - windowRect.Top;

                Rectangle rw     = WinApi.GetWindowRectangle(handle);
                Rectangle rc     = WinApi.GetClientRectangle(handle);
                int       width  = rc.Right - rc.Left;
                int       height = rc.Bottom - rc.Top;
                // create a device context we can copy to
                IntPtr hdcDest = WinApi.CreateCompatibleDC(hdcSrc);
                // create a bitmap we can copy it to,
                // using GetDeviceCaps to get the width/height
                IntPtr hBitmap = WinApi.CreateCompatibleBitmap(hdcSrc, width, height);
                // select the bitmap object
                IntPtr hOld = WinApi.SelectObject(hdcDest, hBitmap);
                // bitblt over
                WinApi.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, rc.X - rw.X, rc.Y - rw.Y, WinApi.SRCCOPY);
                // restore selection
                WinApi.SelectObject(hdcDest, hOld);
                // clean up
                WinApi.DeleteDC(hdcDest);
                WinApi.ReleaseDC(handle, hdcSrc);
                Bitmap bitmap = System.Drawing.Image.FromHbitmap(hBitmap);
                // free up the Bitmap object
                WinApi.DeleteObject(hBitmap);

                return(bitmap);
            }
            catch (Exception)
            {
                return(null);
            }
        }