LogOpenFile opens a log file so that it can be read using LogReadEntry. LogOpenFile returns a log_file_ID number that is used to refer to the file.
For Error Logging:
Specify either a log_file_ID number or a path name. If the log_file_ID number is specified and the log_file_ID is valid the path name is returned. If a path name is specified, the Logging Service will return the log_file_ID that corresponds to the file. (The file will be opened if it is not already open.)
#define INCL_LOGGING #include <os2.h> #include <lfdef.h> ULONG service; PVOID pOpenFile; APIRET rc; rc = LogOpenFile(service, pOpenFile);