VB 用API创建动态菜单，含子菜单且能响应事件。
．模块代码如下：
注意：因为有用到AddressOf OnMenu，函数OnMenu只能放在模块部分。
() As Long
Public Declare Function GetMenu Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function GetMenuItemCount Lib "user32" (ByVal hMenu As Long) As Long
Public Declare Function GetSubMenu Lib "user32" (ByVal hMenu As Long, ByVal nPos As Long) As Long
Public Declare Function CreatePopupMenu Lib "user32" () As Long
Public Declare Function AppendMenu1 Lib "user32" Alias "AppendMenuA" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As String) As Long
Public Declare Function SetMenu Lib "user32" (ByVal hwnd As Long, ByVal hMenu As Long) As Long
Public Declare Function DrawMenuBar Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public MenuCount As Long '菜单数量，不包括不能触发的菜单
Public MenuText() As String '菜单文本，ID=wParam的菜单的文本为MenuText(wParam - 1000)
Public OldWinProc As Long
Public Function OnMenu(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
'{响应菜单事件}
Select Case wMsg
Case WM_COMMAND
If wParam > 1000 And wParam <= 1000 + MenuCount Then
MsgBox MenuText(wParam - 1000)
End If
End Select
OnMenu = CallWindowProc(OldWinProc, hwnd, wMsg, wParam, lParam)
End Function
2．Form1代码如下：
设计窗体的Negotiation=False，以防止弹出对话框或响应OnMenu后窗体上的菜单消失
& MenuCount
'加入子菜单，令其ID>1000，说明其为自动生成的菜单
AppendMenu1 hPopMenuTmp, MF_STRING, 1000 + MenuCount, MenuText(MenuCount)
'如果是间隔线，则wFlags=MF_SEPARATOR
'如果要Check，则wFlags=MF_STRING + MF_CHECKED，若令不可用，则再加MF_GRAYED
Next
AppendMenu1 hFather, MF_POPUP, hPopMenuTmp, "&Files"
End Sub
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