runtime customization of crystal reports

Question

All... I am using vb.net 2003. i am trying to set report groupings of a crystal report at runtime based on user defined options. MSDN says this: Dim FieldDef As FieldDefinition FieldDef = Report.Database.Tables.Item(0).Fields.Item(comboBox1().Text) Report.DataDefinition.Groups.Item(0).ConditionField = FieldDef However, the .ConditionField is Read Only, you cannot assign anything to it. I have searched the object browser at each level of this object model, and cannot figure out how to assign a group to a report. Heres the link to MSDN... the code for SORTING cr at runrime works perfectly, its just the GROUPING code im having trouble with... http://msdn.microsoft.com/library/d...resentation.asp Thanks.