VB 6.0 - How to pass parameters to data report

Hi all
I just want to know how to pass parameteres to data reports?

1.FIrst add data environment
2.set connection for database
3.Add command by right click on connection
4.Right click on command1.
 on Parameter tab set properties
In VB Code
Let i set 2 parameters month and year
I gave name m1 and y1 in parameter tab then
***************************************
Dim m1 As Integer
Dim y1 As Integer
m1 = month1.text
y1 = year1.Text
Dim ff As New DataEnvironment2
ff.Command1_Grouping m1, y1
DataReport1.Refresh
DataReport1.Show vbModal
--------------------------------

:)

thank