Dear Experts, I am trying to write my first TDL Function. It is working, but it is not giving instant result. i am creating one field in voucher entry and i want to get the result in the same voucher as soon as i entered the value. But it showing only voucher alteration mode. please kindly help me. i have given my code. [#part : vchnarration] line:mynewline, mynewlne2 [Line : Mynewline] field : mynewfield [field : mynewfield] use : number field storage :mynumber set Always : yes [Line : mynewlne2] Field : mynewfld2 [Field : mynewfld2] use :Number field set As :$$myfirstfunction [system : Udf] mynumber:number:1111 [function : myfirstfunction] parameter:arasan:Number:$mynumber Returns:Number variable:testvari:number 01:Set:testvari:##arasan*100 02:Return:##testvari