ISAPI without IIS

Hi all, I'm writing an application with a built-in small http-server and using the php4isapi.dll to process php scripts. It works fine under NT+Win2K but on Win98 it craches when I terminate my application (if I have served any http requests). I have a socket listener that spawns a new thread for each request. The newly spawned thread calls the HttpExtensionsProc(). I suspect that the php4isapi.dll does not unload correctly if I have used any php ODBC functions. I would therefore like to tell it to free up all resources because we are going down, but the optional TerminateExtension() is not there. Suggestions anyone ? /Björn Lantz