EXCEL VBA Userform 窗体增加最大化按钮

该功能需要利用 API 函数实现，可以通过编写代码以在窗体加载时增加最大化按钮。您可以参考下面的示例代码：

Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As _
Long, ByVal bRevert As Long) As Long

Private Declare Function AppendMenu Lib "user32" Alias "AppendMenuA" _
(ByVal hMenu As Long, ByVal wFlags As Long, _
ByVal wIDNewItem As Long, ByVal lpNewItem As String) As Long

Private Const MF_STRING = &H0
Private Const MF_SEPARATOR = &H800

Private Sub UserForm_Initialize()

Dim lngWindowHandle As Long
Dim lngMaximizeButton As Long
Dim lngSystemMenuHandle As Long

lngWindowHandle = FindWindow(vbNullString, Me.Caption)
lngSystemMenuHandle = GetSystemMenu(lngWindowHandle, False)

AppendMenu lngSystemMenuHandle, MF_SEPARATOR, 0, ""

lngMaximizeButton = AppendMenu(lngSystemMenuHandle, MF_STRING, _
&HF030, "最大化(&M)")

End Sub

希望这可以帮助您实现您的目标。如果您有任何其他问题，请随时问我！