Modeless dialog's z order.

My program has a main window and when some
event is driven a modeless dialog is represented.
But when I click the main window, the focus is
in the main window but modeless dialog is not
hidden by the main window. I mean the z order of
the modeless dialog is higher than main window.
But I wanna this modeless dialog's overlapped area
with the main window is hidden by the main window.
Can you help me?

Hi,

Did you tried already to pass NULL as parent window handle?

Greetings,
JM

Please send me your code that you tried.