[Qt-interest] Why qt-embedded program must need a server program?

[Kermit Mei]

Dear all,

     I can't understand that why I must set a server program when I want
run a qt program in embedded environment. For example, I want to run my
program mymedia, I must run it after starting qpe, or run "mymedia" with
argument "-qws".

    What's the different between the server and the normal program? Why
qt must need one server program at least? What did it do? Does the
keyPressEvent() be processed in the server?

Thanks
B.R
Kermit Mei