Avoid listing of files being copied, from a directory in C++ Windows

I am copying a file from source server directory to destination server directory. There is a program which runs on the destination server. It reads the directory at regular intervals and finds the list of all files from that directory using FindFirstFile & FindNextFile functions. My problem is due to slow connection between two servers, it takes time to copy large files from source to destination. When I start copying the file, before completion of copy, the program running on the destination server, lists the name of that file. I want to avoid listing of such files which are being copied and it should be possible to list the file only when it is completely copied to the destination server.