pass parameter from form to report:(vs2010)
1.add textbox to report1.rdlc(report name as example)
2.go to data report(ctrl+alt+d) right-click on parameter n add new
3.IN general tab: name:category(as u wish) & set datatype:text(As par ur form data)
and press ok.
4. use this code to ur form;
Dim cat As New ReportParameter("category", ComboBox1.Text)
ReportViewer1.LocalReport.SetParameters(New ReportParameter() {cat})
change category name to ur parameter name.
replace combobox1.text to as per ur component use in ur form.