This expression works:
=Count(Microsoft.VisualBasic.Interaction.IIF(Fields!Report_Number.Value Like "XYZ*",1,Nothing))
But I want to add a condition that says IIF(Fields!Responsible_Organization = "ABC")
so I want to count the number of rows where the report_number value starts with XYZ, and also the responsible_organization = ABC
thank you!
Kim