COM from scratch - PART TWO

// Create.cpp 
#include "iostream.h" 
#include "unknwn.h" 
#include "Create.h" 

typedef IUnknown* (*CREATEFUNCPTR)();

///////////////////////////////
void _TRACE(const char* msg)
{ 
	cout << "Client :\t" <<msg<<endl;
}

/////////////////////////////////////////////
IUnknown* CallCreateInstance(char* dllname)
{
    //-----------------------------------------------------------------------------------//
    // Load dynamic link library into client's process.
    //Loadlibrary maps a DLL module and return a handle that can be used in GetProcAddress
    //to get the address of a DLL function
    //----------------------------------------------------------------------------------//
    _TRACE("Attempting to Load component's server...");
    HMODULE hm = ::LoadLibrary(dllname) ;
    if (hm == NULL)
    {
        _TRACE("CallCreateInstance:\tError: Cannot load the component's server.");
        return NULL ;
    }
    
    // Getting the address of the CreateInstance function.
    CREATEFUNCPTR Function= (CREATEFUNCPTR)::GetProcAddress(hm, "CreateInstance") ;
    
    if (Function == NULL)
    {
        _TRACE("Function is not found!.");
        return NULL ;
    }
    _TRACE("Component's server is loaded sucsussfully.");
    return Function() ;
}