hooking functions..

[harikrishnanm]

Is there any methods to hook the function,which was called inside a .exe file from some other dll files...if we know the prototype of that function....???

[Kiana]

Use Microsoft Detours.
http://research.microsoft.com/en-us/projects/detours/

I assume you're talking about hooking a function within a process' memory space via the use of an injected DLL.