Name VRemoveButtonWindow - unmaps the button window. Synopsis VRemoveButtonWindow() Description VRemoveButtonWindow unmaps the button window. Return Value 0 - work successfully. 290 - button window is already unmapped. Parameters None. Side Effects The global variable lib_butt_win_on_off_selected is made FALSE. Entry Conditions VCreateWindows must be called first. Related FunctionsVRedisplayButtonWindow.