[c-prog] C++ code and Bitmap

[krome152001]

hello
i have a project that required to take a pic with a webcam then it need 
to save the pic as a bitmap file the C++ code would need to do this 
also it need to compare the file to another bitmap picture to see if 
something is there (like a guy wearing a red shirt) so i need some help 
as to how to write this code or where i can get information of how to 
get this done
thanks alot for ur guys help