_WinAPI_DllGetVersion unexpectedly does not work

[DonChunior]

Despite using the function _WinAPI_Wow64EnableWow64FsRedirection(False) and having the appropriate DLL, the function _WinAPI_DllGetVersion in the following code always gives me @error = 1.

#include <WinAPIFiles.au3>
#include <WinAPIShellEx.au3>

Main()

Func Main()
    Local $sDllPath = @WindowsDir & "\System32\QMgr.dll"
    Local $aDllVersion = 0

    _WinAPI_Wow64EnableWow64FsRedirection(False)
    If FileExists($sDllPath) Then
        $aDllVersion = _WinAPI_DllGetVersion($sDllPath)
        If @error Then
            ConsoleWrite("@error = " & @error & @CRLF)
        Else
            ConsoleWrite($aDllVersion[0] & "." & $aDllVersion[1] & "." & $aDllVersion[2] & @CRLF)
        EndIf
    EndIf
EndFunc

I don't understand what is the cause of the error and I hope someone can give me the crucial hint.

[Nine]

As it says in help file :

Quote

This function is not an API. It is exported by name from each DLL that implements it.

If the dll does not implement the 'DllGetVersion' function in its own DLL,  you cannot use  _WinAPI_DllGetVersion.

[DonChunior]

Thanks for the quick solution!
I had not quite understood the remark in the help, but now everything is clear to me.

[Nine]

You may use FileGetVersion instead ?

[DonChunior]

Exactly, the two functions FileGetVersion and StringSplit will also lead me to my goal.