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Inside Macintosh: Macintosh Toolbox Essentials /

Chapter 4 - Window Manager / Window Manager Reference

Window Manager Routines / Retrieving Window Information

FrontWindow

Use the FrontWindow function to find out which window is active.

FUNCTION FrontWindow: WindowPtr;

DESCRIPTION

The FrontWindow function returns a pointer to the first visible window in the
window list (that is, the active window). If there are no visible windows, FrontWindow returns NIL.

SEE ALSO

See Listing 4-9 on page 4-44 for an example that calls FrontWindow to determine whether an event occurred in the active window.

See Listing 4-12 on page 4-55 for an example that calls FrontWindow to determine whether to display a window in front of other windows after changing its size.

See Listing 4-16 on page 4-60 and Listing 4-17 on page 4-61 for examples that call FrontWindow to determine which window is affected by a user command directed
at the active window.