injection : how to add messagebox to exe

[Pushad]

i want inject messagebox in exe from start with ollydbg

[Departure]

Find the entry point.... jmp to code cave ... do your messagebox code, and what ever was written over at entry point from the jmp.... jmp back to entry point.

[myomyinthtike]

I think that you need to fix IAT.

[Pushad]

i used codecave and i got my solution

thanks