Looking at my reports, I find myself constantly using this: =Sum( IIf(Fields!fieldA.Value = "somevalue", Fields!fieldB.Value, 0.00) ) I was trying to implement something like SumIf( Fields!fieldA.Value = "somevalue", Fields!fieldB.Value ) via custom code, but I don't know where to start. Is that even possible?

Hi Krebel, Generally, we can achieve it with expression in SSRS:http://msdn.microsoft.com/en-us/library/ms157328.aspx If you want to implement it with custom code, please refer:http://odetocode.com/Articles/130.aspx http://msdn.microsoft.com/en-us/library/ms157328.aspx#CustomCode Thanks, LolaPlease remember to mark the replies as answers if they help.