Visual Basic File API Routines
FindFirstFile: Extract Filename from a Full Path
Posted:   Sunday February 11, 2001
Updated:   Monday December 26, 2011
Applies to:   VB4-32, VB5, VB6
Developed with:   VB6, Windows 95, Windows 2000
OS restrictions:   None
Author:   VBnet - Randy Birch



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FindFirstFile: Extract Filename from a Full Path
FindFirstFile: Performance Comparison - FSO vs. API
FindFirstFile: Comparison of FindFirstFile and SearchTreeForFile
FindFirstFile: Save a Recursive Search of All Drives to Disk
FindFirstFile: Save a Recursive Search of Specified Drives to Disk
GetFileVersionInfo: File Search and File Property Info
GetLogicalDriveStrings: An API 'DriveExists' Routine
FindFirstFile: An API 'FileExists' Routine
FindFirstFile: An API 'FolderExists' Routine

This function accepts a full path and filename for an existing file and returns just the filename portion. The string passed can represent either a long or short path format.
 BAS Module Code

 Form Code
To the form, add the following code:

Option Explicit
' Copyright 1996-2011 VBnet/Randy Birch, All Rights Reserved.
' Some pages may also contain other copyrights by the author.
' Distribution: You can freely use this code in your own
'               applications, but you may not reproduce 
'               or publish this code on any web site,
'               online service, or distribute as source 
'               on any media without express permission.
Private Const MAX_PATH As Long = 260
Private Const INVALID_HANDLE_VALUE As Long = -1

Private Type FILETIME
   dwLowDateTime As Long
   dwHighDateTime As Long
End Type

Private Type WIN32_FIND_DATA
   dwFileAttributes As Long
   ftCreationTime As FILETIME
   ftLastAccessTime As FILETIME
   ftLastWriteTime As FILETIME
   nFileSizeHigh As Long
   nFileSizeLow As Long
   dwReserved0 As Long
   dwReserved1 As Long
   cFileName As String * MAX_PATH
   cAlternate As String * 14
End Type
Private Declare Function FindFirstFile Lib "kernel32" _
   Alias "FindFirstFileA" _
  (ByVal lpFileName As String, _
   lpFindFileData As WIN32_FIND_DATA) As Long
Private Declare Function FindClose Lib "kernel32" _
  (ByVal hFindFile As Long) As Long
Private Sub Command1_Click()
   Print GetFileNameFromPath("c:\winnt\system32\msvbvm60.dll")
End Sub

Private Function GetFileNameFromPath(ByVal sFullPath As String) As String

   Dim hFile As Long
   hFile = FindFirstFile(sFullPath, WFD)
     'the filename portion is in cFileName
      GetFileNameFromPath = TrimNull(WFD.cFileName)
      Call FindClose(hFile)
   End If
End Function

Private Function TrimNull(startstr As String) As String

   Dim pos As Integer
   pos = InStr(startstr, Chr$(0))
   If pos Then
      TrimNull = Left$(startstr, pos - 1)
      Exit Function
   End If
   TrimNull = startstr
End Function
Wildcards are not permitted in the passed string.


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