How do Free up a library at the end of the program, that I have already loaded I am using the code to initialize the library:

HANDLE hrtflib;
hrtflib = LoadLibrary("RICHED32.DLL");


Now, when the window destroys I use this code to free up the library:

FreeLibrary(hrtflib);
hrtflib = NULL;

But I get an error message saying that cannot convert parameter 1 from void * to _HINSTANCE

how do you fix it?