I know that you can create a control ad hoc in VB3 code similar to:
     load ctlTextBox(1)
     ctlTextBox(1).Top = ctlTextBox(0).Top + ctlTextBox(0).Height
     ctlTextBox(1).Left = ctlTextBox(0).Left
     ctlTextBox(1).Visible = True

What I need to know is, how can you place a control created this way
into a container control like SSPanel?

After I sent the question I realised that all I need do is use the windows
API call 'SetParent', as follows:
    hOldParent = SetParent(ctlTextBox(0).hWnd, pnlContainer(0).hWnd)