Getting a string from COM dll

[BimmerRacer]

Hi guys,

First post here...I am trying to write some code to pull data out of PVCS Tracker using their toolkit API. I can got some things working (i.e. login to Tracker, get record handles, run file exports, etc) but when it comes to reading actual field values I am getting zip.

Below is their code sample which was written in VB6.

Declare Function TrkGetNextQueryName Lib "trktooln" (ByVal trkHandle As Integer, ByVal bufferSize As Integer, ByVal queryName As String, ByRef pRecordType As Integer) As Integer

And my calling it is

        i = 1
        rc = TrkInitQueryNameList(trkHandle)
        While TrkGetNextQueryName(trkHandle, 255, queryName, pRecordType) = TRK_SUCCESS)
            Debug.Print(i & " Query Name : " & queryName)
            i = i + 1
        End While

The call works and runs 7 times as there are 7 piblic queries, but queryName is always "".

I saw something about MarshalAsAttribute as well as StringBuilder class but have not been able to get either to work.

Any help would be great!