C / C++ / MFC

#define ENABLE_FEATURE

#ifdef ENABLE_FEATURE

void foo()
{
	// bar is from the library
	bar();
}

// tell the linker to add this to the libraries
#pragma ???????? // some way to tell the linker to do that?

#endif

class CMobileData
{
  public:
	bool DriverInstalled();//virtual function
	bool DevicePresent();//Virtual function
}

class CMobileData_A: public CMobileData
{
//These 2 methods are implemented in this class and will contain info(strings) unique to this card hardcoded in them.
  public:
	bool DriverInstalled();
	bool DevicePresent();
}

class CMobileData_B: public CMobileData
{
//These 2 methods are implemented in this class and will contain info(strings) unique to this card hardcoded in them.
  public:
	bool DriverInstalled();
	bool DevicePresent();
}

Hi guys!

*need 2 register an ocx programatically
any help's appreciated..

thank's in advance

COleDataObject odj1;
	if( odj1.AttachClipboard() )
	{
		if( odj1.IsDataAvailable( CF_HDROP ) )
		{
			STGMEDIUM StgMed;
			FORMATETC fmte = { CF_HDROP,
        				(DVTARGETDEVICE FAR *)NULL,
        				DVASPECT_CONTENT,
        				-1,
        				TYMED_HGLOBAL };
			if( odj1.GetData( CF_HDROP, &StgMed, &fmte ) )
			{
				HDROP hDrop = (HDROP)StgMed.hGlobal;
								UINT cFiles = ::DragQueryFile(hDrop, (UINT)-1, NULL, 0);				
	CString szText;
		char szFile[MAX_PATH];
	szText="";
	for( UINT count = 0; count < cFiles; count++ )
	{
		::DragQueryFile(hDrop, count, szFile, sizeof(szFile));
		szText += szFile;
		szText += "\r\n";
	}
	m_pRich->ReplaceSel(szText);
				if (StgMed.pUnkForRelease)
				{
					StgMed.pUnkForRelease->Release();
				}
				else
				{
					::GlobalFree(StgMed.hGlobal);
				}
				return;
			}
		}
	}

error C2079: 'odj1' uses undefined class 'COleDataObject'
error C2228: left of '.AttachClipboard' must have class/struct/union
error C2228: left of '.IsDataAvailable' must have class/struct/union
error C2228: left of '.GetData' must have class/struct/union