VSTS 2008测试版中的数据驱动验证规则

We are using VSTS 2008 to perform some relatively simple web testing of a web application that we have under development. We have data sources defined to provide input data to the tests, and would like to perform our validations based on this data source also. The problem that I have is the VS GUI does not allow me to bind values in validation rules to a data source. We are using VSTS 2008 to perform some relative