Problems creating a tabbed network app

[RhinoBull]

Welcome to VBF!

Not sure what that array is for ... however what you can do is create a control array (paste one textbox on the form in design and set its Index = 0) and at runtime simply create new instance as follows (you did attempted):

With frmServer
    For i = 1 To intSomeUbound 'control array member with index 0 already exist
        Load .Text1(i)
        .Text1(i).Move iLeft, iTop 'determine correct position
        'you may need to set text property here
        'you may need to set TAG property here so you can determine later what is what
        .Text1(i).Visible = True
    Next
End With

NOTE: there is another technic exist (controls collection) but using control array might be much easier to handle:

Private Sub Text1_Change(Index As Integer)
    Select Case Index 'or Text1(Index).Tag (or some other identifier)
        Case 0
            'do something
    End Select
End Sub