Can any body tell me the code procedure for preparing parameterized cristel reports? | VB.Net Interview Questions

The report should be generated by taking to or more parameters.
example: report should be genarated FROM DATE to TODATE?
We can generate Crystal Report by using date parameter, but the date format should be "yyyy,mm,dd".
Ex. CrystaReport1.SelectionFormula = "{GLNOTE.L_DT} = date(" & a & ")"
The variable 'a' should be assign with formated date