屏敝文本框菜单方法二.bas

个人VB学习源码精选,自己学习时的一些编程小程序,希望对大家有帮助

Attribute VB_Name = "Module1"
Option Explicit

Public Const GWL_WNDPROC = (-4)

Public Const WM_LBUTTONDOWN = &H201
Public Const WM_RBUTTONDOWN = &H204

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
Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Public prevWndProc As Long

Function WndProc(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    If Msg = WM_RBUTTONDOWN Then
        Msg = WM_LBUTTONDOWN
    End If
    WndProc = CallWindowProc(prevWndProc, hWnd, Msg, wParam, lParam)
End Function