Window Information Accessors

The Window Manager provides accessor functions for Mac OS 8.5-related window info. Your application should always use accessor functions instead of accessing structure fields and low memory directly.

The Mac OS 8.5 Window Manager provides the following functions for determining information about windows:

GetWindowClass obtains the class of a window.
GetWindowAttributes obtains the attributes of a window.
FrontNonFloatingWindow returns a pointer to the application's frontmost visible window that is not a floating window.
IsValidWindowPtr reports whether a pointer is a valid window pointer.