Loading plugin with ghc api

Hi, I would like to use the API for ghc, so that a running program can load a module (Foo.o) and use a function defined in that module. From the documentation available, it seems like thatś possible, but I can´t figure out how to do it. There is an example on the wiki, but the explanation just says the code is equivalent to ghc --make. That example does indeed work, but there is no hint as to whether the running program can then access anything defined in the module it has just loaded. Is there any available documentation on how to load a plugin, or any working example somewhere? Thanks in advance, John O´Donnell