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
Const BIF_RETURNONLYFSDIRS = 1
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
Private Sub Form_Load()
    'KPD-Team 1998
    'URL: http://www.allapi.net/
    'KPDTeam@Allapi.net
    Dim iNull As Integer, lpIDList As Long, lResult As Long
    Dim sPath As String, udtBI As BrowseInfo
 
    With udtBI
        'Set the owner window
        .hWndOwner = Me.hWnd
        'lstrcat appends the two strings and returns the memory address
        .lpszTitle = lstrcat("C:\", "")
        'Return only if the user selected a directory
        .ulFlags = BIF_RETURNONLYFSDIRS
    End With
 
    'Show the 'Browse for folder' dialog
    lpIDList = SHBrowseForFolder(udtBI)
    If lpIDList Then
        sPath = String$(MAX_PATH, 0)
        'Get the path from the IDList
        SHGetPathFromIDList lpIDList, sPath
        'free the block of memory
        CoTaskMemFree lpIDList
        iNull = InStr(sPath, vbNullChar)
        If iNull Then
            sPath = Left$(sPath, iNull - 1)
        End If
    End If
 
    MsgBox sPath
End Sub

Option Explicit
 
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 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 Dir_Dialogo() As String
 Dim iNull As Integer, lpIDList As Long, lResult As Long
 Dim sPath As String, udtBI As BrowseInfo
 
 With udtBI
  'Set the owner window
  .hWndOwner = Form1.hWnd
  'lstrcat appends the two strings and returns the memory address
  .lpszTitle = lstrcat("Seleccione el directorio", ":")
  'Return only if the user selected a directory
  .ulFlags = BIF_RETURNONLYFSDIRS
 End With
 
 'Show the 'Browse for folder' dialog
 lpIDList = SHBrowseForFolder(udtBI)
 
 If lpIDList Then
  sPath = String$(MAX_PATH, 0)
  'Get the path from the IDList
  SHGetPathFromIDList lpIDList, sPath
  'free the block of memory
  CoTaskMemFree lpIDList
  iNull = InStr(sPath, vbNullChar)
  If iNull Then
   sPath = Left$(sPath, iNull - 1)
  End If
 End If
 
 If Len(sPath) > 0 Then
  If Not Right(sPath, 1) = "\" Then
   Dir_Dialogo = sPath & "\"
  Else
   Dir_Dialogo = sPath
  End If
 End If
 
End Function
 

Private Sub Boton_Click()
 Dim Directorio As String
 ' Establece el directorio
 Directorio = Dir_Dialogo
 ' Verifica que haya valor, o sea que no hayan cancelado
 If Len(Directorio) > 0 Then
  Text.Text = Directorio
 End If
End Sub