Create file with LoadRunner

//Name and location of a file to be open or created.
char * filename = "c:\\temp\\logfile.txt";
/*** access mode ***
* r or r+ = open for reading
* w or w+ = open for writing
* a or a+ = open for appending
* t = text mode
* b = binary mode
* where the "+" sign indicates that the file must already exist      *******************/
// Open the file with append mode
char * access_mode = "a+";
//File pointer
long file_stream;
if ((file_stream = fopen(filename, access_mode)) == NULL) {
lr_error_message ("Cannot open or create %s", filename);
return -1;
}
//Write message to output file
fprintf(file_stream, "This is the message to output file");
//Close the file stream
fclose(file_stream);