how to remove blue bar are appearing from switching of one childform into anather in mdiform using vb.net

Question

hi all,

My application having one mdiform in that form six child forms are there.Switching of one form into anather form blur bars are appearing form at the title of every opened child form.These six child forms are opens in mdiform.how to remove the blue bars are appearing from every opened child form in mdiform.how to remove these blue bar.To avoid that issue please help me.


thanks,
Jayawant.