Usign HGCM

[adji]

I'm trying to implement a custom service using HGCM, I followed the instructions on SDKRef.pdf ( Chapter 7 ).
I have a windows guest and a linux host, in the windows guest I have a win32 terminal command that makes an ioctl to connect to a LocalHost_Existing, in the linux host I created a shared library. The ioctl always returns -2900 (VERR_HGCM_SERVICE_NOT_FOUND). I tried a lot of shared library names and locations, nothing works.
Did I need to register to use a custom service (there is some magic to do or some export missing or what ever), how the extension packs works (I know is not the same, but if there is some example I can also write a virtual driver or something).

Thank in advance for any advice/reply Adji.

[Technologov]

Please use vbox-dev mailing list for such questions.

This is user forum, and very few developers here.