ShowWindow
ShowWindow Unhide a window hidden via HideWindow
#include <Windows.h> Window Manager
void ShowWindow(theWindow );
WindowPtr theWindow ; window to unhide
ShowWindow makes a previously-hidden window visible.
theWindow is a WindowPtr obtained via NewWindow or GetNewWindow.
Returns: none

Notes: This does not change the front-to-back ordering of your windows. If you
previously hid the frontmost window, it will have been inactivated and
moved into the next-to-frontmost position. Thus, it will be drawn, but not
activated. Use SelectWindow to both show and activate a window.