Mdi & Sdi form

 IsMdiContainer =True

Me.MdiParent = MainDashboard

 Private Sub MainDashboard_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        IsMdiContainer = True
    End Sub


 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.MdiParent = MainDashboard
    End Sub




Single Document interface        =   sdi          =    Child Form

Multiple Document interface   =   mdi          =    parrent Form