I use Windows 98.
I've just installed DBG and PHP Coder, but I don't know how to debug from PHP Coder.
When I start DBG and I load a script in PHP coder, the debugging options in the latter remain disabled, and the spies put on variables do not give anything.

It may come from a problem when installing DBG : in the DOS window, when I ran the client-side installing script, there was an error message after the first command(regsvr32 PHPDbdPs.dll) : "wrong command or filename".

Anyway, I have no idea of how DBG is supposed to work with PHP Coder.

Can you help me ?

there must be a problem of phpcoder.
If you give phped a try you'd that it works.