Avoid opening of duplicate mdi child

Question

I need to open one instance of a MDI child in VB.Net vs2008...this code opens several duplicates of the same MDI child; I got this answer Prevent duplicate MDI children forms for c# but didnt find one for VB.Net vs 2008

Dim myChild As New Form1()
myChild.MdiParent = Me
myChild.Show()

Answer 1

This is the VB.Net version of Fredrik Mörk's code:

For Each f As Form In Application.OpenForms
  If TypeOf f Is Form1 Then
    f.Activate()
    Return
  End If
Next

Dim myChild As New Form1
myChild.MdiParent = Me
myChild.Show()