ABAP table fileds

hi,

I have this custom table that has the following fields

belnr

trans_type

debit_fieldname

in the table t095 I need to get the the value of whichever filed name

I have in the custom table

example.

Custome Table

BELNR = 1000

TRANS_TYPE = Z09

DEBIT_FIELDNAME = KTANSG

now I have assigned the values of T095 in an internal table t_t095 which has the value for all the fields but the only field i need to get is the

field KTANSG.

what code should I use to get the value of KTANSG,

note the DEBIT_FIELDNAME can change anytime depending on the trans type

please help,.

thanks