>I am providing an interface in .NET for users to choose the criteria for the data in the report. I would like to pass a parameter to Crystal Reports to give it a title and subtitle for the report. It looks like all the parameters require user input. Is there a way just to pass parameters to the report with no user intervention? Thanks.

Yes, assume Crystal is expecting two string parameters, Title2 and Title2:

#region Report Parameters
            //Pass the parameters for Title1 and Title2 to Crystal
            // all the parameter fields will be added to this collection 
            ParameterFields paramFields = new ParameterFields();
 
            // the parameter fields to be sent to the report 
            ParameterField pfField1 = new ParameterField();
            ParameterField pfField2 = new ParameterField();
 
            // setting the name of parameter fields with wich they will be recieved in report 
            pfField1.ParameterFieldName = "Title1";  // just the variable name we used (carryover from old VFP report)
            pfField2.ParameterFieldName = "Title2";  // secondary report title variable name
 
            // the above declared parameter fields accept values as discrete objects 
            // so declaring discrete objects 
            ParameterDiscreteValue dcField1 = new ParameterDiscreteValue();
            ParameterDiscreteValue dcField2 = new ParameterDiscreteValue();
 
            // setting the values of discrete objects 
            dcField1.Value = "Primary Report Title";  //Title1  you can get from anywhere, here for example I just plug it in
            dcField2.Value = "SubReport Title";        //Title2
 
            // add discrete values to parameters 
            pfField1.CurrentValues.Add(dcField1);
            pfField2.CurrentValues.Add(dcField2);
 
            // now adding all these parameter fields to the parameter collection 
            paramFields.Add(pfField1);
            paramFields.Add(pfField2);
 
            // add the parameter collection to the crystal report viewer 
            this.crystalReportViewer1.ParameterFieldInfo = paramFields;
#endregion

Just wanted to add this forum is a really good resource for Crystal Reports and .net:
https://www.sdn.sap.com/irj/scn/forum?forumID=45
(Sometimes the link doesn't work and you have to navigate to the Crystal Reports forum)