I'm new to 'reverse engineering'.. I've done some crackme's, applications, games.. Now i was wondering how to 'reverse engineer' a pocket PC game.. So i made a very simple game by myself for the pocket PC tryin to crack it myself.. I can't disamble the application to look for 'string references' nor i can set a break or anything.. What's the best way to figure this one out ?

The only thing i found is the 'error' message i get when entering any code:

http://home.planet.nl/~roeth019/invalid.jpg

First thing you need to do is learn how to search for tools which might help you do what you want. If you put something, such as "pocket pc debugger" (without the quotes) in your favorite search engine, you will find that there are not alot (maybe no) "debuggers" for the Pocket PC, but there are some available "emulators" for programs written for the Pocket PC in certain languages.

Searching for possible answers is what one is supposed to do before posting here, and, IF you did search for possible solutions, you should indicate you attempted to do some of your own homework If you DID do something to try to help yourself before posting here, you didn't indicate you did or what that was. We are here to assist, but you need to make the initial effort and let us know you did and what you tried. You may have tried alot, but you haven't indicated that yet.

Regards,

squ1rr3l,
two links that may help you(well, help me a lot):
hxxp://www.crhc.uiuc.edu/ECE371EMR/qrc0001c_armside.pdf
hxxp://www.searchlores.org/fravia/personalia/ipaq.htm

But like JMI says, you need search a lot before posting. Try Search for WINCE on this forum.

My difficult now(excluding my poor english ) is try to figure out where things is happened(CMP Serials, Branch next serials/times etc..) on code for patch and not be catch by traps.