Ahmed Ashraf:

Well, my code is so simple but it doesn't do what i need

*First is the shaped wpf form which I make like that:

• Allow transparency = true in window
• Put a grid

• Put an Image and put source as my png image

• Second is the set parent which I did it like that:

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  [DllImport("user32.dll")]
  private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
  
  [DllImport("user32.dll")]
  private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
  
  [DllImport("user32.dll", SetLastError = true)]
  private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
  
  private static int GWL_STYLE = -16;
  private static int GWL_EXSTYLE = -20;
  private static int WS_CHILD = 0x40000000;
  private static int WS_EX_TOOLWINDOW = 0x00000080;
  
  Process hostProcess = Process.GetProcessById(5964);
          IntPtr hostHandle = hostProcess.MainWindowHandle;
  
          var interop = new WindowInteropHelper(this);
          interop.EnsureHandle();
          interop.Owner = hostHandle;
          IntPtr guestHandle = interop.Handle;
  
          SetWindowLong(guestHandle, GWL_EXSTYLE, GetWindowLong(guestHandle, GWL_EXSTYLE) | WS_EX_TOOLWINDOW);
          SetWindowLong(guestHandle, GWL_STYLE, GetWindowLong(guestHandle, GWL_STYLE) | WS_CHILD);
          SetParent(guestHandle, hostHandle);
  
  

That's it.

Edited: When I put both together, it doesn't show on my external exe, it just disappear.

What I need is to put a shaped wpf form into an external exe