I m making an project in which i have to access a file from from 2 programs. One program is in vc++ and other in php.In this i need to lock the file when one of the program is using it.So, when php is using the file, file get locked but if in the mean time when file is locked if vc++ needs to access it it must check whether the file is already been locked or not. so how to check for it using vc++. -regards. Ankush Gupta.