get-handle in window<%>

Returns an exact integer representing a handle to the window in the current platform's GUI toolbox. Cast this number from a C long to a platform-specific C type:

• Windows: HWND

• Mac OS X: WindowRef for a top-level-window<%> object, ControlRef for other windows

• X: Widget*

Some windows may not have a representation in the platform's GUI level, in which case the result of this method is 0.

• (send a-window get-handle) -> exact integer