Add teh paramters to your report.
In your VB code do something like this:

Code:
Set Report = crxApplication.OpenReport("Z:\DAD\BOLSamples.rpt", 1)
For Each crxDatabaseTable In Report.Database.Tables
    crxDatabaseTable.ConnectionProperties("user id") = "sa"
    crxDatabaseTable.ConnectionProperties("Password") = myPasswordTechniSQL
Next crxDatabaseTable
Report.PaperOrientation = crDefaultPaperOrientation
'
'----------
'parameters
'----------
'
Report.ParameterFields.ITEM(1).AddCurrentValue Trim(txtCustomer.Text)
Report.ParameterFields.ITEM(2).AddCurrentValue Trim(txtShipDate.Text)
Report.ParameterFields.ITEM(3).AddCurrentValue Trim(txtBOL.Text)
Report.ParameterFields.ITEM(4).AddCurrentValue Trim(txtShipToName.Text)