does anyone know how to capture video & save it in bmp or jpg.

i have movie 'dat' file, my friend send me that video. now i want to capture some photo/snap from that movie.

i m playing that movie using media player 7. but when i try to capture screen using 'print screen' it dosent work. i dont know why.

if u have any solution or any software which u know pls let me know.

thanks