Description :
Permet de supprimer un élément de menu.
hMenu est le handle du menu à manipuler.
nPosition est la position du menu (ou sous-menu) qui sera supprimé.
wFlags est la méthode de repérage utilisée : MF_BYCOMMAND ou MF_BYPOSITION.

Exemple d'utilisation :

' Origine : fred - chapeaux.ronds@wanadoo.fr

' Le code qui suis permet de désactiver les boutons "X", "min", "max".
' Créer un nouveau projet vb et coller le code suivant dans
' "déclaration" puis essayer les trois boutons les uns après les autres
' (pour cela enlever l'apostrophe devant "no_min" et "no_max").

Option Explicit

Private Declare Function DeleteMenu Lib "user32" (ByVal _
                hMenu As Long, ByVal nPosition As Long, _
                ByVal wFlags As Long) As Long
Private Declare Function GetSystemMenu Lib "user32" (ByVal _
                hwnd As Long, ByVal bRevert As Long) As Long
Private Declare Function GetWindowLong Lib "user32" Alias _
                "GetWindowLongA" (ByVal hwnd As Long, ByVal _
                nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" Alias _
                "SetWindowLongA" (ByVal hwnd As Long, ByVal _
                nIndex As Long, ByVal dwNewLong As Long) As Long

Private Const GWL_STYLE = (-16)
Private Const MF_BYCOMMAND = &H0&
Private Const MF_BYPOSITION = &H400
Private Const SC_MINIMIZE = &HF020
Private Const SC_MAXIMIZE = &HF030
Private Const SC_CLOSE = 6
Private Const WS_MAXIMIZEBOX = &H10000
Private Const WS_MINIMIZEBOX = &H20000

Private Sub no_x()
' Désactiver X
Dim hMenu As Long, k As Long
hMenu = GetSystemMenu(hwnd, False)
k = DeleteMenu(hMenu, SC_CLOSE, MF_BYPOSITION)
End Sub

Private Sub no_min()
' Désactiver 'minimiser'
Dim hMenu As Long, k As Long
hMenu = GetSystemMenu(hwnd, False)
k = DeleteMenu(hMenu, SC_MINIMIZE, MF_BYCOMMAND)
k = GetWindowLong(hwnd, GWL_STYLE)
k = k Xor WS_MINIMIZEBOX
SetWindowLong hwnd, GWL_STYLE, k
End Sub

Private Sub no_max()
' Désactiver 'maximiser'
Dim hMenu As Long, k As Long
hMenu = GetSystemMenu(hwnd, False)
k = DeleteMenu(hMenu, SC_MAXIMIZE, MF_BYCOMMAND)
k = GetWindowLong(hwnd, GWL_STYLE)
k = k Xor WS_MAXIMIZEBOX
SetWindowLong hwnd, GWL_STYLE, k
End Sub

Private Sub Form_Load()
no_x
' no_min
' no_max
End Sub

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