If you have VB5, then use CreatewindowEx API.
Code:
Private Declare Function CreateWindowEx Lib "user32" Alias "CreateWindowExA" (ByVal dwExStyle As Long, ByVal lpClassName As String, ByVal lpWindowName As String, ByVal dwStyle As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hWndParent As Long, ByVal hMenu As Long, ByVal hInstance As Long, lpParam As Any) As Long
Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
Private Const WS_CHILD = &H40000000
Dim btnHwnd As Long
Private Sub Form_Load()
btnHwnd = CreateWindowEx(0, "Button", "Button1", WS_CHILD, 32, 32, 64, 64, hwnd, 0, App.hInstance, ByVal 0)
ShowWindow btnHwnd, 1
End Sub