C / C++ / MFC

void saveVoxels(Voxels * voxelData, const char * fileName) throw(...)
{
	using namespace std;
	ofstream file (fileName, ios::out | ios::binary);
	if (file.is_open())
	{	
		file.write((char *)voxelData, sizeof(Voxels));
		unsigned int size = voxelData->m_sliceWidth * voxelData->m_sliceHeight * voxelData->m_numSlices * sizeof(unsigned short);
		file.write((char *)voxelData->m_pTexture, size);
		file.close();
	}
}
Voxels* loadVoxels(const char * fileName) throw(...)
{
	using namespace std;
	ifstream file(fileName, ios::in | ios::binary | ios::ate);
	if (file.is_open())
	{	
		unsigned long size = file.tellg();
		char * memblock = new char [size];
		file.seekg (0, ios::beg);
		file.read (memblock, size);
		file.close();
		
		//initialize
		Voxels * voxelData = (Voxels *) memblock;
		voxelData->m_pTexture = (unsigned short *) (memblock + sizeof(Voxels));
		return voxelData;
	}
}

error C2327: 'ABC::m_strErrorMessageText' : is not a type name, static, or enumerator

class ABC
{
 public:
  CString        m_strErrorMessageText;
  const char*    GetErrorMessageText(){ return ( (const char*)m_strErrorMessageText ); }

 class DEF 
 {
   public:
     enum tagSource 
     {  INIT, 
        TERMINATE, 
        OPEN, 
        SQL
     } Source;
     char        m_lpErrorText[256];

    DEF(tagSource src){Source = src;}
  };

  class GHI
  {
    public:
error->      GHI() { m_strErrorMessageText = "Registry Information is missing.  Please run BATCH_CONFIG.EXE to correct."; }
};