SSRS - How to call a SPROC with multiple parameters from a report in BIDS?

Hi

I have this SPROC in my database:

[sprocGetClosedOrdersOverview]
(
@fromDate DATETIME,
@toDate DATETIME           
)

In my report have two parameters which I want to call my SPROC with.
I can see my SPROC when I make the dataset in the report.
But I don't know how to call it with the report parameters in the BIDS query designer or somewhere else.

I am using SQL Server 2012 Standard Edition SSRS.

Can anybody provide me with a tutorial on how to do this (preferably visual with screen shots)?