Browse for folders

[coox]

I'm using the browseforfolders thing (code below) and I'm wondering if it's possible to control where on the screen it appears. Anyone?

Option Explicit
Public 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

Public Const BIF_RETURNONLYFSDIRS = 1
Public Const MAX_PATH = 260

Public Declare Sub CoTaskMemFree Lib "ole32.dll" (ByVal hMem As Long)
Public Declare Function lstrcat Lib "kernel32" Alias "lstrcatA" (ByVal lpString1 As String, ByVal lpString2 As String) As Long
Public Declare Function SHBrowseForFolder Lib "shell32" (lpbi As BrowseInfo) As Long
Public Declare Function SHGetPathFromIDList Lib "shell32" (ByVal pidList As Long, ByVal lpBuffer As String) As Long

Public Function BrowseForFolder(hwndOwner As Long, sPrompt As String) As String
'Declare variables to be used
Dim iNull As Integer
Dim lpIDList As Long
Dim lResult As Long
Dim sPath As String
Dim udtBI As BrowseInfo
'initialise variables
With udtBI
.hwndOwner = hwndOwner
.lpszTitle = lstrcat(sPrompt, "")
.ulFlags = BIF_RETURNONLYFSDIRS
End With
'Call the browse for folder API
lpIDList = SHBrowseForFolder(udtBI)
'get the resulting string path
If lpIDList Then
sPath = String$(MAX_PATH, 0)
lResult = SHGetPathFromIDList(lpIDList, sPath)
Call CoTaskMemFree(lpIDList)
iNull = InStr(sPath, vbNullChar)
If iNull Then sPath = Left$(sPath, iNull - 1)
End If
'If cancel was pressed, sPath = ""
BrowseForFolder = sPath
End Function

[Aaron Young]

No Problem, the BrowseInfo Structure allows you to specify the Address of a Callback Function which will process the Dialogs Messages, so you can get the Handle of the Dialog Window..

In a Module..

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 Type RECT
        Left As Long
        Top As Long
        Right As Long
        Bottom As Long
End Type

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 Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
Private Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long

Private Const SWP_NOSIZE = &H1
Private Const BIF_RETURNONLYFSDIRS = 1
Private Const WM_CREATE = &H1

Private Function BrowseProc(ByVal hwnd As Long, ByVal msg As Long, ByVal lParam As Long, ByVal lpData As Long) As Long
    Dim tRECT As RECT
    If msg = WM_CREATE Then
        'The Dialog is Being Created, so Reposition it Now
        'Get the Current Pos
        Call GetWindowRect(hwnd, tRECT)
        'Center it
        Call SetWindowPos(hwnd, 0&, ((Screen.Width / Screen.TwipsPerPixelX) - (tRECT.Right - tRECT.Left)) / 2, ((Screen.Height / Screen.TwipsPerPixelY) - (tRECT.Bottom - tRECT.Top)) / 2, 0, 0, SWP_NOSIZE)
    End If
End Function

Private Function GetAddress(ByVal lAddress As Long) As Long
    GetAddress = lAddress
End Function

Public Function BrowseForFolder(ByVal lHwnd As Long, ByVal sPrompt As String) As String
    Dim tBI As BROWSEINFO
    Dim lList As Long
    Dim lResult As Long
    Dim sPath As String
    
    With tBI
        .hwndOwner = lHwnd
        .lpszTitle = lStrCat(sPrompt, Chr(0))
        .ulFlags = BIF_RETURNONLYFSDIRS
        .lpfnCallback = GetAddress(AddressOf BrowseProc)
    End With
    lList = SHBrowseForFolder(tBI)
    If lList Then
        sPath = Space(260)
        lResult = SHGetPathFromIDList(lList, sPath)
        Call CoTaskMemFree(lList)
        sPath = Left$(sPath, InStr(sPath, Chr(0)) - 1)
    End If
    BrowseForFolder = sPath
End Function

In the Form..

Private Sub Command1_Click()
    Caption = BrowseForFolder(hwnd, "Select Directory..")
End Sub

------------------
Aaron Young
Analyst Programmer
aarony@redwingsoftware.com
adyoung@win.bright.net

[coox]

Hi Aaron, thanks for that but I'm getting the following line appearing in red (which I assume is bad):

.lpfncallback = getAddress(AddressOf BrowseProc)

I'm using VBA - is this the cause?

[Aaron Young]

Yep, I don't believe you can use the AddressOf Function in VBA, sorry, didn't realize you were using VBA.

------------------
Aaron Young
Analyst Programmer
aarony@redwingsoftware.com
adyoung@win.bright.net