I need help for programming

i have created my own filed in voucher entry Supp code but i need when we go there menu item sundry creditor should pop up but i do not know how to do that.

pls. help me to do the programing

 

in the Field level use
Table : List of LedgersChildOfSC
Show Table Always:Yes

[Collection: List of LedgersChildOfSC]
Type: Ledger
Child Of : $$GroupSundryCreditors
Fetch: Name
Format:$Name,10

 

Thanks but i need one field supplier code in sundry creditors and same will display in voucher entry.

or if i enter supplier code like S0301 in alias and at the time of voucher entry in should display with party name + alias and after select it should come alias