How to make Menustrip disable and enable it after login Form

Question

Sorry if this thread has been post before... but i'm here is totaly new and i'm want to ask the profesional master Coder to help me...

i think i can do it just type:

 

menuToolStripMenuItem.Enabled = false;

 

 but it only disable when i login from login Form n click it.... i want menustrip  disable and after i'm login from Login Form it will enable.. Thanks A Lot Sir or Mrs