Extracting MS Project Custom Field Lookup "Description" data

I'm using MS Project 2010 Professional and

I have created a Custom Field which is called "Responsible Person" which is linked to Text2 field

On it Under Custom Attributes> Lookup I have  Under "Value" column ---->Responsible Person Names and Under "Description" Column ----> I have entered email addresses for each person.

For each project tasks , under Text2 I have selected from the dropdown the Responsible person Name ( which is the Value Column)

My Question is there a way to read using VBA, the Lookup "Description" column data which i have entered as email address.

If some one have done it in MS Project 2010 using VBA please guide me how to do this.

Thanks a lot.