how to read domain value description ??

hi,

i have a table field which has a domain. the values in the domain have a description..

on my screen, i want to display these description beside the field name based on what user choses in the dropdown ..

in my dialog, i choose the "dictionary / program fields window F6 " icon from the toolbar and insert the field in the screen. beside that i place a display only text box. at runtime when user chooses a value from this field, i want its associated domain text to be displayed in the output only field..

how to do this ??