Problem with VideoPortLogError

Hello All,
Im using VideoPortLogError to log an error in my video miniport driver on WindowsXP.
The events are logged based on the input ErrorStatus (VP_STATUS) parameter. If I change this
parameter, I get different messages from IoLogmsg.dll.

However, If I try to have my own mc file and log the error text from the mc file, it is not happening.

My question is - Is it possible to have custom-defined error messages in the video miniport driver?
And how can I do it?

Can any one help me in this?

Thanks and Regards
Viswa