[c++ MFC]get element from array

[giuseppe500]

ciao.

ho una struttura
tagSelectionGroup :

typedef struct SelectionGroup
{
	int EntityType;
	int EntityIdCMP; 
	CString EntityId2000;
	CArray<CString,CString> ElementsCMP;
}tagSelectionGroup;

e una variabile

tagSelectionGroup tag;

e un array (pieno) cosi:
CArray<tagSelectionGroup,tagSelectionGroup>* pData

for(int i = 0; i< pData->GetSize(); i++)
{
   tag = pData->GetAt(i);
}

in compilazione mi a quest errore:

c:\MyProjects\ error C2582: 'operator =' function is unavailable in 'SelectionGroup'