Visual Basic - Inactivar la equis de cerrar (esquina derecha sup)

Necesito inactivar (o que no se vea), el boton de cerrar el formulario (el que aparece en la esquina superior derecha, o sea, la X), pero...
OJOOOO, eso si, muy importante, necesito hacerlo pero que el boton de minimizar siga activo

Como se hace?
Gracias

ok, te transcribo el código para deshabilitar el boton cerrar, tenés que pasarle el formulario como parámetro:

' ------------ INICIO ----------
Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Private Declare Function GetMenuItemCount Lib "user32" (ByVal hMenu As Long) As Long
Private Declare Function RemoveMenu Lib "user32" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long
Private Declare Function DrawMenuBar Lib "user32" (ByVal hwnd As Long) As Long

Private Const MF_BYPOSITION = &H400&
Private Const MF_DISABLED = &H2&

Sub DisableX(Frm As Form)
Dim hMenu As Long
Dim nCount As Long
hMenu = GetSystemMenu(Frm.hwnd, 0)
nCount = GetMenuItemCount(hMenu)
Call RemoveMenu(hMenu, nCount - 1, MF_DISABLED Or MF_BYPOSITION)
DrawMenuBar Frm.hwnd
End Sub

'----------- FIN -------