Retrieving a DLL file's version information

[vb400]

How do I retrieve the version information of a DLL file into my program?

[Vlatko]

Use the GetFileVersionInfo API.

Here is an example:

'Author: Riaan Aspeling
'Origin: http://www.planet-source-code.com
'Purpose: GetFileVersion
'Version: VB5+ 

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 Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" (dest As Any, ByVal Source As Long, ByVal Length As Long)


Private Type VS_FIXEDFILEINFO
    dwSignature As Long
    dwStrucVersionl As Integer ' e.g. = &h0000 = 0
    dwStrucVersionh As Integer ' e.g. = &h0042 = .42
    dwFileVersionMSl As Integer' e.g. = &h0003 = 3
    dwFileVersionMSh As Integer' e.g. = &h0075 = .75
    dwFileVersionLSl As Integer' e.g. = &h0000 = 0
    dwFileVersionLSh As Integer' e.g. = &h0031 = .31
    dwProductVersionMSl As Integer ' e.g. = &h0003 = 3
    dwProductVersionMSh As Integer ' e.g. = &h0010 = .1
    dwProductVersionLSl As Integer ' e.g. = &h0000 = 0
    dwProductVersionLSh As Integer ' e.g. = &h0031 = .31
    dwFileFlagsMask As Long' = &h3F For version "0.42"
    dwFileFlags As Long' e.g. VFF_DEBUG Or VFF_PRERELEASE
    dwFileOS As Long' e.g. VOS_DOS_WINDOWS16
    dwFileType As Long ' e.g. VFT_DRIVER
    dwFileSubtype As Long ' e.g. VFT2_DRV_KEYBOARD
    dwFileDateMS As Long' e.g. 0
    dwFileDateLS As Long' e.g. 0
    End Type

'Example to use this function
'MsgBox " Notepad's Version is " & Check
'     FileVersion("C:\Windows\Notepad.exe")


Private Function CheckFileVersion(FilenameAndPath As Variant) As Variant
    On Error Goto HandelCheckFileVersionError
    Dim lDummy As Long, lsize As Long, rc As Long
    Dim lVerbufferLen As Long, lVerPointer As Long
    Dim sBuffer() As Byte
    Dim udtVerBuffer As VS_FIXEDFILEINFO
    Dim ProdVer As String
    lsize = GetFileVersionInfoSize(FilenameAndPath, lDummy)
    If lsize < 1 Then Exit Function
    ReDim sBuffer(lsize)
    rc = GetFileVersionInfo(FilenameAndPath, 0&, lsize, sBuffer(0))
    rc = VerQueryValue(sBuffer(0), "\", lVerPointer, lVerbufferLen)
    MoveMemory udtVerBuffer, lVerPointer, Len(udtVerBuffer)
    '**** Determine Product Version number *
    '     ***
    ProdVer = Format$(udtVerBuffer.dwProductVersionMSh) & "." & Format$(udtVerBuffer.dwProductVersionMSl)
    'Full number:
    'ProdVer = Format$(udtVerBuffer.dwProductVersionMSh) & "." & Format$(udtVerBuffer.dwProductVersionMSl) & "." & Format$(udtVerBuffer.dwFileVersionLSh) & Format$(udtVerBuffer.dwFileVersionLSl)
    CheckFileVersion = ProdVer
    Exit Function
    HandelCheckFileVersionError:
    CheckFileVersion = "N/A"
    Exit Function
End Function

[vb400]

Thank you, that worked nicely!