1、首先在开发工具中打开VBA编辑器
2、在单元格区域当中输入一些内容作为例子
3、在VBA编辑器中插入模块
4、在模块当中输入如下代码，然后运行
Private Declare Function GetWindowLong Lib "use32" Alias
"GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Private Declare Function FindWindow Lib "use32" Alias "FindWindowA"
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function SetWindowLong Lib "use32" Alias
"SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong
As Long) As Long
Private Const GWL_STYLE=(-16)
Private Const WS_THICKFRAME As Long=&H40000
Private Const WS_MINIMIZEBOX As Long=&H20000
Private Const WS_MAXIMIZEBOX As Long=&H10000
Private Sub UserForm_Initialize()
Dim hWndForm As Long
Dim IStyle As Long
hWndForm=FindWindow("ThunderDFrame", Me.Caption)
IStyle=GetWindowLong(hWndForm, GWL_STYLE)
IStyle=IStyle Or WS_THICKFRAME
IStyle=IStyle Or WS_MINIMIZEBOX
IStyle=IStyle Or WS_MAXIMIZEBOX
SetWindowLong hWndForm, GWL_STYLE, IStyle
End Sub
5、用快捷键F5运行窗体，则窗体右上角显示最大化和最小化按钮，效果如图
