Read a text file looking for string located between two text markers

#include <fstream>
	
	
	string extracted_string;
	std::string next_line;
	size_t find_result;
	bool found_start = false;
	
	extracted_string = "";
	
	//We open the file and look for the ascii text between a start marker and end marker and return the first found.
	
	//----- OPEN THE FILE -----
	std::ifstream ifstream1(EventsFilePath.c_str());
	if (ifstream1.is_open())
	{
		while (getline(ifstream1, next_line))
		{
			//----- GET NEXT LINE -----
			if (found_start)
			{
				extracted_string += next_line;
			}
			else
			{
				if ((find_result = next_line.find("[EVENT_START_YqzlQ2W4GOrkWr4qH]")) != string::npos)
				{
					//----- START MARKER FOUND -----
					cout  << "Starts at " << find_result << endl;
					found_start = true;
					extracted_string = next_line.substr((find_result + 31), string::npos); 
				}
			}
			
			if (found_start)
			{
				if ((find_result = extracted_string.find("[EVENT_END_YqzlQ2W4GOrkWr4qH]")) != string::npos)
				{
					//----- END MARKER FOUND -----
					cout  << "End at " << find_result << endl;
					//extracted_string = extracted_string.substr(0, extracted_string.find("[EVENT_END_YqzlQ2W4GOrkWr4qH]"));
					extracted_string = extracted_string.substr(0, find_result);
					break;
				}
			}
		}
		ifstream1.close();
	}
	
	cout  << "Extracted string: " << extracted_string << endl;
    return(extracted_string);