private void UpdateLayeredWindow()
{
Bitmap bitmap1 = new Bitmap(Size.Width, Size.Height, PixelFormat.Format32bppArgb);
using (Graphics graphics1 = Graphics.FromImage(bitmap1))
{
SizeStruct size1;
PointStruct point1;
PointStruct point2;
Rectangle rectangle1 = new Rectangle(0, 0, Size.Width, Size.Height);
PerformPaint(new PaintEventArgs(graphics1, rectangle1));
IntPtr ptr1 = User32.GetDC(IntPtr.Zero);
IntPtr ptr2 = Gdi32.CreateCompatibleDC(ptr1);
IntPtr ptr3 = bitmap1.GetHbitmap(Color.FromArgb(0));
IntPtr ptr4 = Gdi32.SelectObject(ptr2, ptr3);
size1.cx = Size.Width;
size1.cy = Size.Height;
point1.x = Location.X;
point1.y = Location.Y;
point2.x = 0;
point2.y = 0;
Blendfunction blendfunction1 = new Blendfunction {
BlendOp = 0, BlendFlags = 0, SourceConstantAlpha = _alpha, AlphaFormat = 1
};
User32.UpdateLayeredWindow(Handle, ptr1, ref point1, ref size1, ptr2, ref point2, 0, ref blendfunction1, 2); //2=ULW_ALPHA
Gdi32.SelectObject(ptr2, ptr4);
User32.ReleaseDC(IntPtr.Zero, ptr1);
Gdi32.DeleteObject(ptr3);
Gdi32.DeleteDC(ptr2);
}
}
internal static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref PointStruct pptDst, ref SizeStruct psize, IntPtr hdcSrc, ref PointStruct pprSrc, int crKey, ref Blendfunction pblend, int dwFlags);
internal static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref PointStruct pptDst, ref SizeStruct psize, IntPtr hdcSrc, ref PointStruct pprSrc, int crKey, ref Blendfunction pblend, int dwFlags);
private void UpdateLayeredWindow()
{
Bitmap bitmap1 = new Bitmap(Size.Width, Size.Height, PixelFormat.Format32bppArgb);
using (Graphics graphics1 = Graphics.FromImage(bitmap1))
{
SizeStruct size1;
PointStruct point1;
PointStruct point2;
Rectangle rectangle1 = new Rectangle(0, 0, Size.Width, Size.Height);
PerformPaint(new PaintEventArgs(graphics1, rectangle1));
IntPtr ptr1 = User32.GetDC(IntPtr.Zero);
IntPtr ptr2 = Gdi32.CreateCompatibleDC(ptr1);
IntPtr ptr3 = bitmap1.GetHbitmap(Color.FromArgb(0));
IntPtr ptr4 = Gdi32.SelectObject(ptr2, ptr3);
size1.cx = Size.Width;
size1.cy = Size.Height;
point1.x = Location.X;
point1.y = Location.Y;
point2.x = 0;
point2.y = 0;
Blendfunction blendfunction1 = new Blendfunction { BlendOp = 0, BlendFlags = 0, SourceConstantAlpha = _alpha, AlphaFormat = 1 };
User32.UpdateLayeredWindow(Handle, ptr1, ref point1, ref size1, ptr2, ref point2, 0, ref blendfunction1, 2); //2=ULW_ALPHA
Gdi32.SelectObject(ptr2, ptr4);
User32.ReleaseDC(IntPtr.Zero, ptr1);
Gdi32.DeleteObject(ptr3);
Gdi32.DeleteDC(ptr2);
}
}