Win9X: How to get ProcessID from process handle or vs.?

In my Win9X VxD(sorry to ask here), I get a ProcessID from our application.
I want to know the process handle related to this process ID. Because the
only way I know to a get specific process information in Win9X kernel is:
VWIN32_GetCurrentProcessHandle. I can map this address to a liner address
to get the process name or path. But I don’t know how to get the process ID
from this handle.

Any hint related to process ID(application level) and process handle(kernel)
is greatly welcome.

Guoqing