How can I add a New Option to the Test Explorer Context Menu ?

Hi Guys!

I'm developing a VS Extension to keep track of the Unit Tests on the TFS Server and get info about the evolution of a project.

I want my extension to have a new option on the Test Explorer Context Menu, in order to open a new window with information about the Test Selected (Similar to the Run Selected Test option).

So far i've looked on the "stdidcmd.h" and "vsshlids.h" for some GUID that could be useful to me, but no success. Also i've tried to look for the GUID for the Test Explorer Context Menu with VSDebug ({1E198C22-5980-4E7E-92F3-F73168D1FB63}), but when i apply it to the GuidSymbol node on the VSCT file and i try the extension, nothing is shown.

Someone knows how can i add the described option on the Test Explorer in a VS Extension?

Thank you for your help! :-)