m_open

This call opens an existing file.

Syntax:      int far m_open(FCB *fp, char *filespec, int len, int sys, int nobuf) 
Parameters:  FCB far *fp - Pointer to the File Control block
             char far *filespec - Path and filename of file to be opened
             int len - Size of file to be opened
             int sys - 0 = 
                       non-zero = The desired file exists in the Metro system 
                                  directory (likely to be unnecessary in 
                                  the hand-held). 
             int nobuf - 0 = The file will be buffered.
                         non-zero = No buffering will be performed.
Returns:     If successful, the values in fp will be updated and 0 will be returned.  
             Otherwise, a non-zero error code is returned.