Hi, 1) I have to generate unique id on the basis of file name and line no. For that I am using macros __FILE__ and __LINE__. But __FILE__ is giving full path with the file name and two double quotes at the begining and end(for example, "C:\Project\Test\log.cfg" ). I need to get the unique id in the format as <file name>_<line no>. For example if above is the file description and let line no is 11, then the unique id would be log_11. Please suggest. 2) I have to pass variable no of arguments in the macro. So, I want to use Boost PARAM macro. For example, if LIST is the macro name and I want to call it as LIST(MSG_ID, "good", 5, "failed", "50%", 10); Here parameters are of different types, only the fist parameter is fixed that is string type and always with same variable name. Other parameters will vary. Please help me out in making the macro with variable no. of parameters. Please suggest, Thanks Prasanta