Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Private Declare Function DeleteMenu Lib "user32" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long
Private Sub DisableSystemMenuClose()
Dim hMenu As Long
hMenu = GetSystemMenu(hwnd, False)
DeleteMenu hMenu, 6, &H400 'delete Close
DeleteMenu hMenu, 5, &H400 'delete -
End Sub