Passing field values of a BC as arguments in Business service context of DVM.

Hello,

Most of you aware that we can call business service in adminstration - data validations.
When i was doing that, I was able to call the business service by hard coding the argument's values. but I was unable to pass field value of a BC as arguments in Business Service context.

Could anybody tell how to achieve this.

Thanks in advance..

Regards,
Jagadeesh