C / C++ / MFC

HINSTANCE DLLhInstance = LoadLibrary("PathToFile.DLL") ;
typedef int (*FUNC)(int) ;          // this is a typedef of the function prototype
FUNC        function = NULL ;

if (DLLhInstance != NULL)
    {
    // get pointers to functions
    // add others here
    function = (FUNC)GetProcAddress(DLLhInstance, "Func") ;
    // call the function
    int value = function(value_to_pass) ;
    FreeLibrary(DLLhInstance) ;     // release library
    function = NULL ;
    DLLhInstance = NULL ;
    }