internal void Close()
{
if (Region != IntPtr.Zero)
{
Gdi32.SetWindowRgn(Handle, IntPtr.Zero, false);
Gdi32.DeleteObject(Region);
}
User32.CloseWindow(_handle);
User32.SetParent((int)_handle, 0);
User32.DestroyWindow(_handle);
}
private void DrawToLayeredWindow()
{
RECT rect = new RECT();
User32.GetWindowRect(_handle, ref rect);
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
if (width == 0 || height == 0)
{
return;
}
POINT newLocation = new POINT(rect.left, rect.top);
SIZE newSize = new SIZE(width, height);
IntPtr screenDc = User32.GetDC(IntPtr.Zero);
IntPtr memDc = Gdi32.CreateCompatibleDC(screenDc);
using (Bitmap bmp = GetBitmap(width, height))
{
IntPtr hBitmap = bmp.GetHbitmap(_transparent);
IntPtr hOldBitmap = Gdi32.SelectObject(memDc, hBitmap);
User32.UpdateLayeredWindow(_handle, screenDc, ref newLocation, ref newSize, memDc, ref _ptZero, 0, ref _blend, 0x02);
User32.ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
Gdi32.SelectObject(memDc, hOldBitmap);
Gdi32.DeleteObject(hBitmap);
}
}
Gdi32.DeleteDC(memDc);
GC.Collect();
}
public IntPtr GetDC(Message msg)
{
IntPtr res = IntPtr.Zero;
if (msg.Msg == (int)WindowsMessages.WM_NCPAINT)
{
int flags = (int)DCX.DCX_CACHE | (int)DCX.DCX_CLIPSIBLINGS | (int)DCX.DCX_WINDOW | (int)DCX.DCX_VALIDATE;
IntPtr hrgnCopy = IntPtr.Zero;
if (msg.WParam != Win32.TRUE)
{
flags |= (int)DCX.DCX_INTERSECTRGN;
hrgnCopy = Gdi32.CreateRectRgn(0, 0, 1, 1);
Gdi32.CombineRgn(hrgnCopy, msg.WParam, IntPtr.Zero, Gdi32.RGN_COPY);
}
res = User32.GetDCEx(Handle, hrgnCopy, flags);
return(res);
}
return(User32.GetWindowDC(Handle));
}
