Hi again,
My appologize. Sorry I forget to mentions that I'm using 2 types of code
(Macro and Function).

This macro code should bring up the popup Browser:-
Sub OpenMyBrowser()
Dim FName, SUBDIR, ROOTDIR As String
FName = BrowseFolder("Testing")
If FName = "" Then
End
Else
End If
'procceed next code here
End Sub

I dont think there is a problem with "Sub OpenMyBrowser()".
Probably someone could help me to modify the functions:-

Private Const BIF_RETURNONLYFSDIRS As Long = &H1
Private Const BIF_DONTGOBELOWDOMAIN As Long = &H2
Private Const BIF_RETURNFSANCESTORS As Long = &H8
Private Const BIF_BROWSEFORCOMPUTER As Long = &H1000
Private Const BIF_BROWSEFORPRINTER As Long = &H2000
Private Const BIF_BROWSEINCLUDEFILES As Long = &H4000
Private Const MAX_PATH As Long = 260

Type BrowseInfo
hOwner As Long
pidlRoot As Long
pszDisplayName As String
lpszINSTRUCTIONS As String
ulFlags As Long
lpfn As Long
lParam As Long
iImage As Long
End Type

Type SHFILEOPSTRUCT
hwnd As Long
wFunc As Long
pFrom As String
pTo As String
fFlags As Integer
fAnyOperationsAborted As Boolean
hNameMappings As Long
lpszProgressTitle As String
End Type

Declare Function SHGetPathFromIDListA Lib "shell32.dll" ( _
ByVal pidl As Long, _
ByVal pszBuffer As String) As Long

Declare Function SHBrowseForFolderA Lib "shell32.dll" ( _
lpBrowseInfo As BrowseInfo) As Long


Function BrowseFolder(Optional Caption As String = "") As String

Dim BrowseInfo As BrowseInfo
Dim FolderName As String
Dim ID As Long
Dim Res As Long

With BrowseInfo
.hOwner = 0
.pidlRoot = 0
.pszDisplayName = String$(MAX_PATH, vbNullChar)
.lpszINSTRUCTIONS = Caption
.ulFlags = BIF_RETURNONLYFSDIRS
.lpfn = 0
End With

FolderName = String$(MAX_PATH, vbNullChar)

ID = SHBrowseForFolderA(BrowseInfo)

If ID Then
Res = SHGetPathFromIDListA(ID, FolderName)
If Res Then
BrowseFolder = Left$(FolderName, InStr(FolderName, _
vbNullChar) - 1)
End If
End If
End Function

Thanks in advance.
Jaemun.