Method for logging in a text file

Hi, i need a method which logs into a text file CSV following data:

for each position:

id open; description open; open time; open price; id close; description close; close time; close price; volume; profit

I have a lot different methods=strategies for opening/closing positions. And meanwhile it has become difficult to analyses which of the methods is profitable and which is not. I want be able to look after a backtesting in a file and simply add all profits of one method (=id) to see this at once. If the file is CSV, i can use excel to filter for ID.

For this purpose you will have to write a method

void pos_log(int type, int id, string description)
type: -1=open sell, 1=open buy, 99=close all

. I will call the method each time when opening/closing a position(s).

There is a global variable "Lots" where the volume can be accessed.

I have already a function and a structure, which is collecting some necessary info about open positions. You can add there some info. And when the position should be closed, you have to write the data into file.

struct STRUCT_ORDER_INFO {
 datetime ot;
   double op;
   double lot;
      int type;
   string sign;
   int magicNr;
};
STRUCT_ORDER_INFO order_info[];

//==========================================================================================================================================================//
void GetTickets_and_OrdersInfo() 
{  
...
}
//20140922 DIUBAKIN (end)