Get value from TVARVC table to select-options

Hi,

I have a entry in the TVARVC table. I need to know how to assign it to the select-option by default.

eg, if i have z_vkorg as type S , low is 1000 and high is 1000 sign is I and opt is bt.

how to assign it to the select-options in the selection screen by default.

Thanks and Regards,
Muthu