dynanic report with checkbox control

hi all ,
(Using C#.net) there are 4 fields (name , family name , ave , stNumber )in my table . for this , in my form(form1) I've 4 CheckBox Controls . I want to take a report whenever the user select one or two or ... of them . for example , if the user checked CheckBox1(for the name field ) and CheckBox2(for the family field) , In outpout report show , name and family . how can i dot with crystal report ?
plz help me .In Form1 I've a checkbox control . I created a parameter in crystal report .
this is my code :
in btnReport_Click :

{
string strQuery = "SELECT Name FROM MyTable";
sqlconn.Open();
daAdapter = new SqlDataAdapter(strQuery, sqlconn);
SqlCommandBuilder scb = new SqlCommandBuilder(daAdapter);
da.Fill(DatatSet1.MyTable);
//Definitions
ParameterField paramfield = new ParameterField();
ParameterFields paramfields = new ParameterFields();
ParameterDiscreteValue discreteval = new ParameterDiscreteValue();
//setting
paramfield.Name = "Name";
discreteval.Value = ??
paramfield.CurrentValues.Add(discreteval);
paramfields.Add(paramfield);
crystalReportViewer1.ParameterFieldInfo = paramfields;crystalReportViewer1.ReportSource = crystalreport1;
sqlconn.Close();}

I want to take a report from all of records' Name field of the Table When The user checked "CheckBox1" Control .
plz help me in this :
discreteval.Value = ??
thanx|||You can use global variables

Public gblnShowName As Boolean

In Command button Sub, set the value

If chkShowName.Value = vbChecked Then
gblnShowName = True
Else
gblnShowName = False
End If

Then inside the report code section,

If gblnShowName = True Then
Report.NameField.Suppress = False
Else
Report.NameField.Suppress = True
End If

I normally code like this in VB6, hope it works in .NET also.|||hi,
It doesn't work .|||at last it was solved .
in report sheet , right click on any field , and select Format Object and then checked on suppress CheckBox . after that , in Form1.cs , in btnShowReport_Click , write this :
myCrystalReport1.ReportDefinition.Sections[2].ReportObjects["firstname1"].ObjectFormat.EnableSuppress = false;