Exemple #1
0
        void UpdatePPMask(System.Drawing.Bitmap bitmap)
        {
            IntPtr screenDc  = Win32.GetDC(IntPtr.Zero);
            IntPtr memDc     = Win32.CreateCompatibleDC(screenDc);
            IntPtr hBitmap   = IntPtr.Zero;
            IntPtr oldBitmap = IntPtr.Zero;

            try
            {
                hBitmap   = bitmap.GetHbitmap(System.Drawing.Color.FromArgb(0));
                oldBitmap = Win32.SelectObject(memDc, hBitmap);

                Win32.Size          size        = new Win32.Size(bitmap.Width, bitmap.Height);
                Win32.Point         pointSource = new Win32.Point(0, 0);
                Win32.Point         topPos      = new Win32.Point(Left, Top);
                Win32.BLENDFUNCTION blend       = new Win32.BLENDFUNCTION();
                blend.BlendOp             = Win32.AC_SRC_OVER;
                blend.BlendFlags          = 0;
                blend.SourceConstantAlpha = 255;
                blend.AlphaFormat         = Win32.AC_SRC_ALPHA;

                Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
            }
            finally
            {
                Win32.ReleaseDC(IntPtr.Zero, screenDc);

                if (hBitmap != IntPtr.Zero)
                {
                    Win32.SelectObject(memDc, oldBitmap);
                    Win32.DeleteObject(hBitmap);
                }

                Win32.DeleteDC(memDc);
            }
        }
        void UpdatePPMask(System.Drawing.Bitmap bitmap)
        {
            IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
            IntPtr memDc = Win32.CreateCompatibleDC(screenDc);
            IntPtr hBitmap = IntPtr.Zero;
            IntPtr oldBitmap = IntPtr.Zero;

            try
            {
                hBitmap = bitmap.GetHbitmap(System.Drawing.Color.FromArgb(0));
                oldBitmap = Win32.SelectObject(memDc, hBitmap);

                Win32.Size size = new Win32.Size(bitmap.Width, bitmap.Height);
                Win32.Point pointSource = new Win32.Point(0, 0);
                Win32.Point topPos = new Win32.Point(Left, Top);
                Win32.BLENDFUNCTION blend = new Win32.BLENDFUNCTION();
                blend.BlendOp = Win32.AC_SRC_OVER;
                blend.BlendFlags = 0;
                blend.SourceConstantAlpha = 255;
                blend.AlphaFormat = Win32.AC_SRC_ALPHA;

                Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
            }
            finally
            {
                Win32.ReleaseDC(IntPtr.Zero, screenDc);

                if (hBitmap != IntPtr.Zero)
                {
                    Win32.SelectObject(memDc, oldBitmap);
                    Win32.DeleteObject(hBitmap);
                }

                Win32.DeleteDC(memDc);
            }
        }