ShowHide
ShowHide Show or hide a window
#include <Windows.h> Window Manager
void ShowHide( theWindow, showFlag );
WindowPtr theWindow ; ID of window to show or hide
Boolean showFlag ; TRUE=show, FALSE=hide
ShowHide lets you show or hide a window, without affecting the
front-to-back ordering of the windows.
theWindow is a WindowPtr obtained via NewWindow or GetNewWindow.
showFlag is a Boolean value specifying whether to show or hide a window. It
may be one of:
TRUE Show the window
FALSE Hide the window
Returns: none

Notes: The ShowWindow and HideWindow function are more commonly used.
This is a lower-level function. It has no effect on the highlighting or
front-to-back ordering of the windows (with HideWindow, hiding the
frontmost window causes it to be deactivated while activating and
highlighting the window in the next lower plane).
Use this function with caution, and only when ShowWindow and
HideWindow won't suffice.