Efectivamente David, aqui el codigo:
Código:
Private Declare Function GetParent Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long
Const GW_HWNDNEXT = 2
Dim mWnd As Long
Private Sub Form_Load()
Form2.Show
mWnd = Form2.hwnd
SetParent mWnd, Me.hwnd
End Sub
Private Sub Form_Unload(Cancel As Integer)
Unload Form2
End Sub
Pero ten cuidado q al monento de cambiar de tamaña a la ventana Padre se te puede presentar algunos problemas.