In FM, Wht is SELNAME?

Hi Experts,

In FM I wanna to pass S_CUST - low as 1000 so,

1)Wht r the entries in,

SELNAME - ??????

K- (I guess S as its select option)

S- (I-include)

OP- (EQ - equal)

Low- (10000)

pls. clarify,

2) I hv a Check Box to pass to FM, so How to define, Is itRSPARAMS?

3) I wanna to put default as 5000 for S_ORGNSN, So, simply keeping as default in IMPORT tab?

thanq.