You must use the Proficy Portal default.htm file and use the ? to indicate that you will be passing parameters. You can pass more than one parameter by using & between parameters, like this:
http://hostname/PathToProficyPortal/default.asp?ParameterName=value&NextParameterName=value
For example, to log in as the user guest with the password guest, you would use the following URL syntax:
http://localhost/ProficyPortal/default.asp?USER=guest&PASSWORD=guest
The URL line parameters DISPLAY, EMBEDDED, SYMFILE as well as the parameter list only apply if running the client application. Although they may be added when using the Admin or QueryEditor values, they will not be used.
For example:
http://localhost/ProficyPortal/Startup.asp?APP=QueryEditor&EMBEDDED=ShowDisplayOnly
This will simply run the Query Editor. The EMBEDDED parameter will be ignored.