Modify Path in C++

gistfile1.txt

//Try to set the path to the Matlab binaries.  The below does not work.  The runtime 
	//tries to load the dependencies before this can be executed.  Investigate delay loadding of dll.
	//The code is kept here for reference. 
	//I have previously experienced an issue where the environment variable can not be used.  There is a maximun path
	//length of 2048 for the system environment variable. Exceeding this will cause
	//myriad problems with a Windows 7 system.  If you find you icon image cache is corrupt - check the 
	//length of your path variable. 
	//char* envV= getenv("PATH");
	////Returns an errno if there is a problem.
	////int setOK = _putenv( "PATH=C:\\Program Files\\MATLAB\\R2012b\\bin\\win64;%PATH%");
	//system("set PATH=C:\\Program Files\\MATLAB\\R2012b\\bin\\win64;%PATH%"); //This works too
	//envV= getenv("PATH");