How do you tell if a window is modal or mdi window?

Question

Given an window handle, is it possible to tell if the window is modal, or maybe an mdi child window?

Answer 1

The following will return true if and only if the window is a MDI child window:

GetWindowLong(Handle, GWL_EXTSTYLE) and WS_EX_MDICHILD <> 0

Answer 2

It would also appear that if a window doesn't have the WS_CHILD style then it is a dialog,modal window, or mdi child.

GetWindowLong(Handle, STYLE) and WS_CHILD != WS_CHILD