Option Explicit
Private Type BrowseInfo
lngHwnd 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 Const BIF_RETURNONLYFSDIRS = 1
Private Const MAX_PATH = 260
Private Declare Sub CoTaskMemFree Lib "ole32.dll" _
(ByVal hMem As Long)
Private Declare Function lstrcat Lib "Kernel32" _
Alias "lstrcatA" (ByVal lpString1 As String, _
ByVal lpString2 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
Public Function BrowseForFolder(ByVal lngHwnd As Long, ByVal strPrompt As String) As String
On Error GoTo ehBrowseForFolder 'Trap for errors
Dim intNull As Integer
Dim lngIDList As Long, lngResult As Long
Dim strPath As String
Dim udtBI As BrowseInfo
'Set API properties (housed in a UDT)
With udtBI
.lngHwnd = lngHwnd
.lpszTitle = lstrcat(strPrompt, "")
.ulFlags = BIF_RETURNONLYFSDIRS
End With
'Display the browse folder...
lngIDList = SHBrowseForFolder(udtBI)
If lngIDList <> 0 Then
'Create string of nulls so it will fill in with the path
strPath = String(MAX_PATH, 0)
'Retrieves the path selected, places in the null
'character filled string
lngResult = SHGetPathFromIDList(lngIDList, strPath)
'Frees memory
Call CoTaskMemFree(lngIDList)
'Find the first instance of a null character,
'so we can get just the path
intNull = InStr(strPath, vbNullChar)
'Greater than 0 means the path exists...
If intNull > 0 Then
'Set the value
strPath = Left(strPath, intNull - 1)
End If
End If
'Return the path name
BrowseForFolder = strPath
Exit Function 'Abort
ehBrowseForFolder:
'Return no value
BrowseForFolder = Empty
End Function
|
本类阅读TOP10