Child of an MDI Child

[Steven McGarva]

I have an MDI app which opens various Child forms. I want to drill down from these child forms and open other Child forms, but how do I ensure these are still childred on the MDI container?

The following code is on a button in a Child form and the form opens but not as a child in the MDI?

Should I somehow call a procedure from my Child form into the MDI and let the MDI "manage" the new sub-child? How best to do this?

    Friend FormDetail As frmDetail

 Private Sub cmdDetail_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdDetail.Click
        ' 
        ' Show the details Screen.

        If FormDetail Is Nothing Then
            ' A new Detail Form is Required.
            FormDetail = New frmDetail(thisUser, mstrStartDate)
            FormDetail.StartPosition = FormStartPosition.CenterParent
            'Display the new form.
            FormDetail.Show()
        End If
        '
    End Sub

This opens a form but not as a child of the MDI.