Hi guys,
I have a little problem when creating MDI style in VB.NET. In the MDIcontainer form (Form1) , I put a button and in its click event I wrote these codes:

dim frmchild as New form2
frmchild.MDIParent = Me
frmchild.Show()

OK, then the MDIChild showed up...No problemo...it run well. But when I click the button again, another MDIChild form showed in the MDIContainer form...again and again. Is there a way to stop the MDIChild from keep on showing ?

THX