控制MDI窗口的,最大化.最小化按钮!_mdi多窗口最大最小-优快云博客

本文链接：https://blog.youkuaiyun.com/lang_csdn/article/details/160986

博客展示了使用USER32库中的多个函数进行窗口设置的代码。通过声明GetSystemMenu、GetMenuItemCount等函数，实现了去除窗口最小化、最大化按钮以及控制菜单部分选项的功能，包含了常量定义和相关操作代码。

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Private Declare Function GetSystemMenu Lib "USER32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Private Declare Function GetMenuItemCount Lib "USER32" (ByVal hMenu As Long) As Long
Private Declare Function RemoveMenu Lib "USER32" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags 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 Declare Function GetWindowLong Lib "USER32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private Const WS_MINIMIZEBOX = &H20000
Private Const WS_MAXIMIZEBOX = &H10000
Private Const GWL_STYLE = (-16)
Private Const MF_BYPOSITION = &H400&
Private Const MF_REMOVE = &H1000&
Private Sub MDIForm_Load()
    Dim lWnd As Long
    DisableX
    lWnd = GetWindowLong(Me.hwnd, GWL_STYLE)
    lWnd = lWnd And Not (WS_MINIMIZEBOX)
    lWnd = lWnd And Not (WS_MAXIMIZEBOX)
    lWnd = SetWindowLong(Me.hwnd, GWL_STYLE, lWnd)
End Sub

Private Sub DisableX()
        '/* 不显示控制菜单
         Dim hMenu, nCount, LO     As Long
         hMenu = GetSystemMenu(Me.hwnd, 0)
         nCount = GetMenuItemCount(hMenu)
         LO = RemoveMenu(hMenu, nCount - 3, MF_REMOVE Or MF_BYPOSITION)
         LO = RemoveMenu(hMenu, nCount - 4, MF_REMOVE Or MF_BYPOSITION)
End Sub