How to call a C++ dll function at runtime ?

[VladimirF]

Say the dll code contains the following declarations:

extern MY_API double * pVector;

// Get rid of name mangeling
extern "C"
{
...
	MY_API double * fvec(void);
...
	MY_API void cleanup(void);
...
}

...What am I doing wrong?

Your cleanup(), obviously, should take as a parameter a pointer returned by fvec().