Visual Basic Programming Code Examples

Visual Basic > Common Dialogs Code Examples

Displaying The Search For Directory Dialog

Displaying The Search For Directory Dialog

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 Const BIF_RETURNONLYFSDIRS = 1
Private Const BIF_DONTGOBELOWDOMAIN = 2
Private Const MAX_PATH = 260

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

'Wrapper Function.
Private Sub DirBox(Msg As String, Directory As String)

    'Dimension some variables.
    Dim lpIDList As Long
    Dim sBuffer As String
    Dim szTitle As String
    Dim tBrowseInfo As BrowseInfo
    
    'Set the message displayed on the dialog.
    szTitle = Msg
    
    'Set up the Type.
    With tBrowseInfo
       .hWndOwner = Me.hWnd
       .lpszTitle = lstrcat(szTitle, "")
       .ulFlags = BIF_RETURNONLYFSDIRS + BIF_DONTGOBELOWDOMAIN
    End With
    
    'Show the dialog box.
    lpIDList = SHBrowseForFolder(tBrowseInfo)

    'Process the data returned.
    If (lpIDList) Then
       sBuffer = Space(MAX_PATH)
       SHGetPathFromIDList lpIDList, sBuffer
       sBuffer = Left(sBuffer, InStr(sBuffer, vbNullChar) - 1)
       Directory = sBuffer
    End If

End Sub