'''grab set''' ''?-'''''global'''''? window'' Sets a grab on ''window''. If -global is specified then the grab is global, otherwise it is local. If a grab was already in effect for this application on ''window'' 's display then it is automatically released. If there is already a grab on ''window'' and it has the same global/local form as the requested grab, then the command does nothing. Returns an empty string. ---- See also: * [grab] * [grab release] ---- [Category Command] - [Tk syntax help]