To run callout method, you have to bind a Callout method with a column.
For example, here we bind callout method to column VAT_BasicSalary and VAT_HRA. Full name of callout method with namespace of above class is VAT.Model.CalloutEmployeeSalary.netSalary.
So,Login with SystemAdministration Role
Open Window ->Table and Column, Find DB Table Name record VAT_Employee
Go to third tab Column, Find the DB Column Namerecord VAT_BasicSalay
Set Callout checkbox to True
Set Callout Code to ‘VAT.Model.CalloutEmployeeSalary.netSalary’ (As Show in Below Pic)
Same done for other column VAT_HRA
