添加菜单到系统菜单

添加菜单到系统菜单

Private Sub Form_Load()

    OldWindowProc = GetWindowLong(Form1.hwnd, GWL_WNDPROC)    ' 取得窗口函数的地址    Call SetWindowLong(Form1.hwnd, GWL_WNDPROC, AddressOf SubClass1_WndMessage)    ' 用SubClass1_WndMessage代替窗口函数处理消息

    SysMenuHwnd = GetSystemMenu(Form1.hwnd, False)

    Call AppendMenu(SysMenuHwnd, MF_SEPARATOR, 2000, vbNullString)    Call AppendMenu(SysMenuHwnd, MF_STRING, 2001, "关于本程序(&A)")    Call AppendMenu(SysMenuHwnd, MF_SEPARATOR, 2002, vbNullString)    Call AppendMenu(SysMenuHwnd, MF_STRING, 2003, "恢复系统菜单(&R)")End Sub

Private Sub Form_Unload(Cancel As Integer)    If OldWindowProc <> GetWindowLong(Form1.hwnd, GWL_WNDPROC) Then        Call SetWindowLong(Form1.hwnd, GWL_WNDPROC, OldWindowProc)    End IfEnd Sub

Option Explicit

' API函数声明Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As LongPublic Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As LongPublic 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 Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As LongPublic Declare Function AppendMenu Lib "user32" Alias "AppendMenuA" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As Any) As LongPublic Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long

' 常数声明Public Const WM_SYSCOMMAND = &H112' 单击控制框产生此消息Public Const MF_SEPARATOR = &H800&' 为菜单加一条分隔线Public Const MF_STRING = &H0&' 在菜单中加一个字符串Public Const GWL_WNDPROC = (-4)

' 全局变量Public OldWindowProc As Long' 保存默认的窗口函数地址Public SysMenuHwnd As Long' 保存系统菜单句柄

Public Function SubClass1_WndMessage(ByVal hwnd As Long, ByVal Msg As Long, ByVal wp As Long, ByVal lp As Long) As Long    If Msg <> WM_SYSCOMMAND Then        SubClass1_WndMessage = CallWindowProc(OldWindowProc, hwnd, Msg, wp, lp)        ' 如果消息不是WM_SYSCOMMAND，就调用默认的窗口函数处理        Exit Function    End If

    Select Case wp        Case 2001            Call MsgBox("本程序实现了修改系统菜单的功能  ", vbOKOnly + vbInformation)        Case 2003            Call GetSystemMenu(Form1.hwnd, True)            Call SetWindowLong(Form1.hwnd, GWL_WNDPROC, OldWindowProc)            Call MsgBox("已经恢复了默认的系统菜单  ", vbOKOnly + vbInformation)        Case Else            SubClass1_WndMessage = CallWindowProc(OldWindowProc, hwnd, Msg, wp, lp)            Exit Function    End Select

    SubClass1_WndMessage = True

End Function

 

       以上代码来自： 源代码数据库(SourceDataBase)           当前版本： 1.0.538               作者： Shawls           个人主页： Http://Shawls.Yeah.Net             E-Mail： ShawFile@163.Net                 QQ： 9181729