Option Explicit
' Source: http://support.microsoft.com/kb/147659/en-us/
Private Declare Function FindWindow Lib "user32" _
Alias "FindWindowA" (ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Private Declare Function PostMessage Lib "user32" _
Alias "PostMessageA" (ByVal hwnd As Long, _
ByVal wMsg As Long, ByVal wParam As Long, _
ByVal lParam As Long) As Long
Private Declare Function OpenProcess Lib "kernel32" _
(ByVal dwDesiredAccess As Long, _
ByVal bInheritHandle As Long, _
ByVal dwProcessId As Long) As Long
Private 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
Private Declare Function GetWindowText Lib "user32" _
Alias "GetWindowTextA" (ByVal hwnd As Long, _
ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, _
ByVal wCmd As Long) As Long
Const GW_HWNDNEXT = 2
Const WM_CLOSE = &H10
Const SYNCHRONIZE = &H100000
Public Sub Test()
Dim hWindow As Long
Dim hProcess As Long
Dim lProcessId As Long
Dim lngReturnValue As Long
' File name change
hWindow = SearchHndByWndName_Parent("1.pdf")
hProcess = OpenProcess(SYNCHRONIZE, 0&, lProcessId)
lngReturnValue = PostMessage(hWindow, WM_CLOSE, 0&, 0&)
End Sub
Private Function SearchHndByWndName_Parent(strSearch As String) As Long
Dim strTMP As String * 100
Dim nhWnd As Long
nhWnd = FindWindow(vbNullString, vbNullString)
Do While Not nhWnd = 0
If GetParent(nhWnd) = 0 Then
GetWindowText nhWnd, strTMP, 100
If InStr(strTMP, strSearch) > 0 Then
SearchHndByWndName_Parent = nhWnd
Exit Do
End If
End If
nhWnd = GetWindow(nhWnd, GW_HWNDNEXT)
Loop
End Function
