How to declare types dynamcally?

Hi guys,

I want to write the below types dynamically in my program. Is it possible? If yes, how?

TYPES : BEGIN OF ty_kna1,

kunnr TYPE kna1-kunnr,

land1 TYPE kna1-land1,

name1 TYPE kna1-name1,

ort01 TYPE kna1-ort01,

telf1 TYPE kna1-telf1,

END OF ty_kna1.

Thanks,

Ibrahim