It was nice talking to you Nalaka.

Based on our discussion, I think I have found at-least one way of solving your problem.
Well there must be some way thru reflection as well, but being a follower of OOPs
Philosophies, I think if you just define an interface with the said function, and base all
your child forms on it, you will get the solution to your problem

Just define an interface which would look something like

Interface IMyBase
    Sub Perform_ButtonClick(ByVal Button As String)
End Interface

implement this interface in all your child form classes like this

Public Class Form2
    Inherits System.Windows.Forms.Form
    Implements IMyBase

.
.
.

    Public Sub Perform_ButtonClick(ByVal Button As String) Implements IMyBase.Perform_ButtonClick
        MsgBox("FORM II")
    End Sub

then change you MdiParent CType.... stetement to this

CType(Me.ActiveMdiChild, IMyBase).Perform_ButtonClick("NEW")


Regards
Ankur Verma

Hi Ankur,

Thank you very much. It's working.:)
Nice to hear that you are a follower of OOPs because that's what I'm trying to do but I don't have a good knowledge about interface pholimorphism.:(

I would be pleased if you can explain me how interface polimorphism works here in this solution and how do we solve this kind of a problem through reflection..

Thank you again.

Well Nalaka, u may notice that this forum has a section called “Browse Books” where you can find some really good books with material on application and practical knowledge of OOPs concepts.

Polymorphism is one of the core concepts you learn under OOPs. And I would suggest that you should get a good book on it if you really wanna learn it. It’s always better that way than trying to learn it from some guy who you met at a forum. :)

Regards
Ankur Verma

Hi Ankur,

ThanX for your help. I really appreciate. Your posts really helped to improve my knowledge and skills.
:)
nalla