Memory leaks in C++ using FindFile and file handles

I am writing an app that is moving files on windows and I gotnsome memory leaks. I don't have access to the code now, but I know I forgot to close file handles used to iterate over files with FindFirstFile and FindNextFile. Can this cause memory leaks, or does something else have to be wrong with my code? I cannot post any fragments now, but I am wondering, if this me cause the problem.