Cost Sensitive classificaition

I need to incorporate the cost of classifications while growing the decision tree.

for the same i have refer the algorithm named C4.5CS. if anyone has implemented this algorithm in C, C++ or JAVA i will appreciate if one can share the same with me.

even if one can provide me the partial implementation of algorithm on this link then it will be helpful for me for my further research work. http://metaoptimize.com/qa/questions/5126/using-c45-and-naive-bayes-for-feature-selection

regards, Ankit