The KBForm openForm and openReport methods take an optional argument which is a dictionary of parameter (name, value) pairs, for instance ^[53]

def eventFunc (button) :
    button.getBlock().getForm().openReport \
    (    "Clients",
         { Company : "Big%" }
    )
      

If the Clients report has not defined any user entry paramaters, then it will execute immediately. Assuming that you have done something sensible with the Company parameter such as having a where expression like Company like '${Company:%}', then the report should just show big companies.

This mechanism can be taken to extremes. For instance, you could have a where expression which is just ${Filter}, and then pass the Filter parameter as Company like 'Big%'. This way, you can construct completely arbitrary filters in a script. Below is an example from the RekallDemo database:

# This is comment and not a shortcut, since the leading # is followed
# by whitespace. OK, agreed, its a hack!
#
def eventFunc (button) :
    text = RekallMain.promptBox \
           (    "Enter pattern or leave empty for all",
                "",
                "Select companies"
           )
    if text == None : return
    if text != "" : text = "Company like '" + text + "'"
    button.getBlock().getForm().openForm ('Client', {'Filter' : text})
      

For reference, here is the KBForm onLoad event for the Client form. This displays a subtlety of inline events. Because the text is just a property like any other property (width, font, etc.), they are subject to parameter substitution, so the script here displays a welcome message, which also shows the filter, if there is one.

def eventFunc (form) :
    message = "Welcome to the Clients Form!"
    if "${Filter}" != "" :
        message = message + "\nFilter: " + "${Filter}"
    RekallMain.messageBox(message)