Retrieve File Version Number?

Is it possible to retrieve the version number of a specific file such as a system DLL using VB?

Here's how to Extract all File Info, including Version, this only works for 32-bit Files..

Code:

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Private Declare Function GetFileVersionInfo Lib "Version.dll" Alias "GetFileVersionInfoA" (ByVal lptstrFilename As String, ByVal dwHandle As Long, ByVal dwLen As Long, lpData As Any) As Long
Private Declare Function GetFileVersionInfoSize Lib "Version.dll" Alias "GetFileVersionInfoSizeA" (ByVal lptstrFilename As String, lpdwHandle As Long) As Long
Private Declare Function VerQueryValue Lib "Version.dll" Alias "VerQueryValueA" (pBlock As Any, ByVal lpSubBlock As String, lplpBuffer As Any, puLen As Long) As Long
Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (lpString1 As Any, lpString2 As Any) As Long

Private Sub Command1_Click()
    Dim sVerInfo(7) As String
    Dim sInfo As String
    Dim sValue As String
    Dim sFile As String
    Dim sData() As Byte
    Dim lSize As Long
    Dim lPointer As Long
    Dim iIndex As Integer
   
    On Error GoTo OpenError
    With CommonDialog1
        .CancelError = True
        .Filter = "DLL's|*.DLL"
        .ShowOpen
        sFile = .FileName
    End With
    Text1 = ""
    'Get the Length of the FileVersion Information
    lSize = GetFileVersionInfoSize(sFile, ByVal 0&)
    'Create a Buffer to hold the Version Info
    ReDim sData(lSize)
    'Get the Version Info
    If GetFileVersionInfo(sFile, 0&, lSize, sData(0)) Then
        'Extract the Details of the Version Info
        sVerInfo(0) = "CompanyName"
        sVerInfo(1) = "FileDescription"
        sVerInfo(2) = "FileVersion"
        sVerInfo(3) = "InternalName"
        sVerInfo(4) = "LegalCopyright"
        sVerInfo(5) = "OriginalFileName"
        sVerInfo(6) = "ProductName"
        sVerInfo(7) = "ProductVersion"
        For iIndex = 0 To 7
            sInfo = "\StringFileInfo\040904E4\" & sVerInfo(iIndex)
            If VerQueryValue(sData(0), sInfo, lPointer, lSize) Then
                sValue = Space(lSize)
                lstrcpy ByVal sValue, ByVal lPointer
                Text1.SelText = sVerInfo(iIndex) & ": " & sValue
                Text1.SelText = vbCrLf
            End If
        Next
    End If
OpenError:
End Sub

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Alternatively, here's a Wrapper I wrote to enable you to Retrieve 16bit Version Info as well as 32bit:

Code:

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Private Declare Function GetFileVersionInfo Lib "version.dll" Alias "GetFileVersionInfoA" (ByVal lptstrFilename As String, ByVal dwHandle As Long, ByVal dwLen As Long, lpData As Any) As Long
Private Declare Function GetFileVersionInfoSize Lib "version.dll" Alias "GetFileVersionInfoSizeA" (ByVal lptstrFilename As String, lpdwHandle As Long) As Long

Public Function GetVersion(ByVal sFile As String) As String
    On Error GoTo Err_NoVer
    Dim sVerInfo As String
    Dim iVerLen As Integer
    Dim iVerPos As Long
    iVerLen = GetFileVersionInfoSize(sFile, 0&)
    sVerInfo = Space(iVerLen)
    Call GetFileVersionInfo(sFile, 0&, iVerLen, ByVal sVerInfo)
    iVerPos = InStr(sVerInfo, "FileVersion") + 12
    If iVerPos = 12 Then
        'Check for 32bit Dll
        sVerInfo = StrConv(sVerInfo, vbFromUnicode)
        iVerPos = InStr(sVerInfo, "FileVersion") + 13
    End If
    GetVersion = Mid(sVerInfo, iVerPos, InStr(iVerPos, sVerInfo, Chr(0)) - 1)
Err_NoVer:
End Function

Private Sub Command1_Click()
    On Error GoTo UserCancelled
    With CommonDialog1
        .DialogTitle = "Select a File.."
        .CancelError = True
        .Filter = "All Files|*.dll"
        .ShowOpen
        Caption = GetVersion(.FileName)
    End With
UserCancelled:
End Sub

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Aaron Young
Analyst Programmer
[email protected]
[email protected]
Certified AllExperts Expert

[This message has been edited by Aaron Young (edited 02-12-2000).]

Thanks. That worked