Prohibit Creation of new records on child applet

For Example I need to prohibit creation of any activity records for opportunity which has been won.

.

Steps to configure same:

Parent Business Component        : Opportunity

Child Business Component          : Action

Child Applet                                : Activity List Applet

1.      In Siebel Tools navigate to Object explorer in applet query for Activity List Applet

2.      Create new applet user property as below

a.       Name : CanInvokeMethod: NewRecord

b.      Value : [Disable Creation]

3.      Navigate to Business Component and query for ‘Action’ BC.

4.      Create a new Calculated field as specified below:

Name	Calculated	Calculated Value	Force Active	Immediate Post Changes
Disable Creation	Y	IIf(ParentBCName () = "Opportunity",IIf(ParentFieldValue ("Sub-Status") = LookupValue("STATUS", "Won"), "N", "Y"),"Y")	Y	Y