So you're saying that you want VB.NET to pass a list of employees to Crystal Reports and then it prints from that list? If so, you could use VB.NET to create a comma delimited string of the employee numbers to print. Then assign this to the record selection formula of the ReportDocument class. I would use syntax similar to the following for the record selection formula:
{yourtable.EmployeeId} IN [1001, 2005, 3123]