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Attribute VB_Name = "BrowseDirectorysOnly"
'/*************************************************************************
' *
' * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
' *
' * Copyright 2000, 2010 Oracle and/or its affiliates.
' *
' * OpenOffice.org - a multi-platform office productivity suite
' *
' * This file is part of OpenOffice.org.
' *
' * OpenOffice.org is free software: you can redistribute it and/or modify
' * it under the terms of the GNU Lesser General Public License version 3
' * only, as published by the Free Software Foundation.
' *
' * OpenOffice.org is distributed in the hope that it will be useful,
' * but WITHOUT ANY WARRANTY; without even the implied warranty of
' * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
' * GNU Lesser General Public License version 3 for more details
' * (a copy is included in the LICENSE file that accompanied this code).
' *
' * You should have received a copy of the GNU Lesser General Public License
' * version 3 along with OpenOffice.org. If not, see
' * <http://www.openoffice.org/license.html>
' * for a copy of the LGPLv3 License.
' *
' ************************************************************************/
' Modified as BIF_STATUSTEXT overflows for nested folders so is no longer
' shown.
'=====================================================================================
' Browse for a Folder using SHBrowseForFolder API function with a callback
' function BrowseCallbackProc.
'
' This Extends the functionality that was given in the
' MSDN Knowledge Base article Q179497 "HOWTO: Select a Directory
' Without the Common Dialog Control".
'
' After reading the MSDN knowledge base article Q179378 "HOWTO: Browse for
' Folders from the Current Directory", I was able to figure out how to add
' a callback function that sets the starting directory and displays the
' currently selected path in the "Browse For Folder" dialog.
'
'
' Stephen Fonnesbeck
' steev@xmission.com
' http://www.xmission.com/~steev
' Feb 20, 2000
'
'=====================================================================================
' Usage:
'
' Dim folder As String
' folder = BrowseForFolder(Me, "Select A Directory", "C:\startdir\anywhere")
' If Len(folder) = 0 Then Exit Sub 'User Selected Cancel
'
'=====================================================================================
Option Explicit
Private Const BIF_STATUSTEXT = &H4&
Private Const BIF_RETURNONLYFSDIRS = 1
Private Const BIF_DONTGOBELOWDOMAIN = 2
Private Const MAX_PATH = 260
Private Const WM_USER = &H400
Private Const BFFM_INITIALIZED = 1
Private Const BFFM_SELCHANGED = 2
Private Const BFFM_SETSELECTION = (WM_USER + 102)
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As String) As Long
Private Declare Function SHBrowseForFolder Lib "shell32" (lpbi As BrowseInfo) As Long
Private Declare Function SHGetPathFromIDList Lib "shell32" (ByVal pidList As Long, ByVal lpBuffer As String) As Long
Private Declare Function lstrcat Lib "kernel32" Alias "lstrcatA" (ByVal lpString1 As String, ByVal lpString2 As String) As Long
Private Type BrowseInfo
hWndOwner As Long
pIDLRoot As Long
pszDisplayName As Long
lpszTitle As Long
ulFlags As Long
lpfnCallback As Long
lParam As Long
iImage As Long
End Type
Private m_CurrentDirectory As String 'The current directory
'
Public Function BrowseForFolder(owner As Form, Title As String, StartDir As String) As String
'Opens a Treeview control that displays the directories in a computer
Dim lpIDList As Long
Dim szTitle As String
Dim sBuffer As String
Dim tBrowseInfo As BrowseInfo
m_CurrentDirectory = StartDir & vbNullChar
szTitle = Title
With tBrowseInfo
.hWndOwner = owner.hWnd
.lpszTitle = lstrcat(szTitle, "")
.ulFlags = BIF_RETURNONLYFSDIRS + BIF_DONTGOBELOWDOMAIN '+ BIF_STATUSTEXT
.lpfnCallback = GetAddressofFunction(AddressOf BrowseCallbackProc) 'get address of function.
End With
lpIDList = SHBrowseForFolder(tBrowseInfo)
If (lpIDList) Then
sBuffer = Space(MAX_PATH)
SHGetPathFromIDList lpIDList, sBuffer
sBuffer = Left(sBuffer, InStr(sBuffer, vbNullChar) - 1)
BrowseForFolder = sBuffer
Else
BrowseForFolder = ""
End If
End Function
Private Function BrowseCallbackProc(ByVal hWnd As Long, ByVal uMsg As Long, ByVal lp As Long, ByVal pData As Long) As Long
Dim lpIDList As Long
Dim ret As Long
Dim sBuffer As String
On Error Resume Next 'Sugested by MS to prevent an error from
'propagating back into the calling process.
Select Case uMsg
Case BFFM_INITIALIZED
Call SendMessage(hWnd, BFFM_SETSELECTION, 1, m_CurrentDirectory)
End Select
BrowseCallbackProc = 0
End Function
' This function allows you to assign a function pointer to a vaiable.
Private Function GetAddressofFunction(add As Long) As Long
GetAddressofFunction = add
End Function
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