[uml-user] how to check file is already open in windows

[imcc]

Hi, I am currently working on backup application which portable On Linux, windows and MAC-Osx .   While taking the backup I want to exclude those files Which are open.    In Linux lsof uses   /proc/<pid>/fd  directory  to list Open files.   In windows how to check whether a file is already Open or not. Is there any API for this checking or file property to check?                                                       Sunil                                                             SPSOFT