Modeless dialog always remanins in foreground?

[pc_dev]

I am working on SDI application that creates a modeless dialog, the problem is that modeless dialog always remains in foreground, even if i click on the title bar of the sdi frame. I have set style of sdi frame window to WS_EX_TOPMOST but it donot works for modeless dialog. How can i bring modeless dialog to the back of Z order, SetWindowPosition also do not work. It looks that windows always puts modeless dialog in forground of main window. how this default behaviour can be changed.

[Nyarlatotep]

Create the dialog as child of the desktop (GetDesktopWindow()) instead of the main application window ...

[pc_dev]

Thanks for the idea, instead of making it child of desktop i have made it child of another class, because i dont know effects of making it child of desktop it may mind :) any how the problem is solved.