An Xbasic expression that returns a value.
Change the expression if field is a calculated field.
The .EXPR_SET() method sets an expression for a calculated field. Note : This does not apply to a calculated field that is defined at the Field Rules level.
dim frm as P frm = form.view("Invoice") frm.total.field_get().expr_set("Invoice_Items->Quantity * Invoice_Items->Price")
Desktop applications only.