有時(shí)候，我們可能相在用戶窗體標(biāo)題欄添加最大化和最小化按鈕，以方便對(duì)用戶窗體的操控。下面是我找到的一段實(shí)現(xiàn)此功能的VBA代碼，供大家需要時(shí)調(diào)用。

#If Win64 Then

    Private Declare PtrSafeFunction GetWindowLongPtr _

        Lib 'user32.dll'Alias 'GetWindowLongPtrA' ( _

        ByVal hwnd As LongPtr, _

        ByVal nIndex As Long) AsLongPtr

    Private Declare PtrSafeFunction SetWindowLongPtr _

        Lib 'user32.dll'Alias 'SetWindowLongPtrA' ( _

        ByVal hwnd As LongPtr, _

        ByVal nIndex As Long, _

        ByVal dwNewLong As LongPtr)As LongPtr

    Private Declare PtrSafeFunction FindWindowA _

        Lib 'user32.dll'( _

        ByVal lpClassName AsString, _

        ByVal lpWindowName AsString) As LongPtr

    Private Declare PtrSafeFunction DrawMenuBar _

        Lib 'user32.dll'( _

        ByVal hwnd As LongPtr) AsLong

#Else

    Private Declare FunctionGetWindowLongPtr _

        Lib 'user32.dll'Alias 'GetWindowLongA' ( _

        ByVal hwnd As Long, _

        ByVal nIndex As Long) AsLong

    Private Declare FunctionSetWindowLongPtr _

        Lib 'user32.dll'Alias 'SetWindowLongA' ( _

        ByVal hwnd As Long, _

        ByVal nIndex As Long, _

        ByVal dwNewLong As Long) As Long

    Private Declare FunctionFindWindowA _

        Lib 'user32.dll'( _

        ByVal lpClassName AsString, _

        ByVal lpWindowName AsString) As Long

    Private Declare FunctionDrawMenuBar _

        Lib 'user32.dll'( _

        ByVal hwnd As Long) As Long

#End If

Private Sub UserForm_Initialize()

    CreateMenu

End Sub

Private Sub CreateMenu()

    Const GWL_STYLE As Long = -16

    Const WS_SYSMENU As Long =&H80000

    Const WS_MINIMIZEBOX As Long =&H20000

    Const WS_MAXIMIZEBOX As Long =&H10000

    #If Win64 Then

        Dim lngFrmWndHdl As LongPtr

        Dim lngStyle As LongPtr

    #Else

        Dim lngFrmWndHdl As Long

        Dim lngStyle As Long

    #End If

    lngFrmWndHdl =FindWindowA(vbNullString, Me.Caption)

    lngStyle =GetWindowLongPtr(lngFrmWndHdl, GWL_STYLE)

    lngStyle = lngStyle OrWS_SYSMENU       'AddSystemMenu

    lngStyle = lngStyle OrWS_MINIMIZEBOX   'Add MinimizeBox

    lngStyle = lngStyle Or WS_MAXIMIZEBOX   'Add MaximizeBox

    SetWindowLongPtr lngFrmWndHdl,GWL_STYLE, lngStyle

    DrawMenuBar lngFrmWndHdl

End Sub

將上述代碼放置在用戶窗體代碼模塊中，運(yùn)行后的效果如下圖所示：