modhwnd.bas

小型企业进销存源代码 一款小型企业进销存源代码

Attribute VB_Name = "modHwnd"
'****************************************************************************
'人人为我，我为人人
'枕善居汉化收藏整理
'发布日期：2007/05/02
'描    述：小型企业进销存源代码
'网    站：http://www.Mndsoft.com/  (VB6源码博客)
'网    站：http://www.VbDnet.com/   (VB.NET源码博客,主要基于.NET2005)
'e-mail  ：[e-mail]
'e-mail  ：[e-mail]
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'          如果您有新的好的代码别忘记给枕善居哦!
'****************************************************************************
'调用程序用
Option Explicit

Public Const GW_HWNDNEXT = 2

Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hWnd As Long, lpdwProcessId As Long) As Long
Declare Function GetParent Lib "user32" (ByVal hWnd As Long) As Long
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As Long, ByVal lpWindowName As Long) As Long
Declare Function GetWindow Lib "user32" (ByVal hWnd As Long, ByVal wCmd As Long) As Long
Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hWnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long

' Return the window handle for an instance handle.
Function InstanceToWnd(ByVal target_pid As Long) As Long
    Dim test_hwnd As Long
    Dim test_pid As Long
    Dim test_thread_id As Long

    ' Get the first window handle.
    test_hwnd = FindWindow(ByVal 0&, ByVal 0&)

    ' Loop until we find the target or we run out
    ' of windows.
    Do While test_hwnd <> 0
        ' See if this window has a parent. If not,
        ' it is a top-level window.
        If GetParent(test_hwnd) = 0 Then
            ' This is a top-level window. See if
            ' it has the target instance handle.
            test_thread_id = GetWindowThreadProcessId(test_hwnd, test_pid)

            If test_pid = target_pid Then
                ' This is the target.
                InstanceToWnd = test_hwnd
                Exit Do
            End If
        End If

        ' Examine the next window.
        test_hwnd = GetWindow(test_hwnd, GW_HWNDNEXT)
    Loop
End Function