Code Injection

Hi All,

I am chasing a bit of advice in regards to code injection, so any help appreciated

to find a spot to inject my code is it
(image base + virtual offset + virtual size)
so if
Image base = 00400000
Virtual offset = 1000
and virtual size = c7000
does that mean I can inject my code into
004C8000

when I am looking at this address
I appears to have code allready there,
is it real code or Junk code that can be over written

when I modify this area the program tends to fall over after executing my code



Many thanks

R@dier