[c-prog] Systemwide Hooking Problem

[n00palice]

HI,

I have got stuck while doing system wide hooking. my application is 
simple chat log managment of all messengers running on windows. does 
any buddy have idea how to debug hook based application? I am using 
WH_GETMESSAGE hook. I run app It hooks processes but when new process 
add (means new application starts) it crash application. I need your 
help urgently. Thanks in advance