I'd like to know how activate and deactivate the mdicontainer's main menu each time that a mdichild is loaded and downloaded, 'cause i want to avoid users to use more than one window at a time, thank's, i'm working with vb.net and windowsforms, but when i try to activate mdicontainer's main menu once the user have close the mdichild form, i cannot refer to the instance of the mdicontainer, i don't know how to do it

thanks for any help