Question

I want to create a c# application with multiple windows that are all transparent with some text on.

The tricky part is making these forms sit on top of the desktop but under the desktop icons. Is this possible?

Answer 1

Just making the window transparent is very straight forward:

this.BackColor = Color.Fuchsia; this.TransparencyKey = Color.Fuchsia; 

You can do something like this to make it so you can still interact with the desktop or anything else under your window:

public const int WM_NCHITTEST = 0x84; public const int HTTRANSPARENT = -1;  protected override void WndProc(ref Message message) {     if ( message.Msg == (int)WM_NCHITTEST )     {         message.Result = (IntPtr)HTTRANSPARENT;     }     else     {         base.WndProc( ref message );     } }