var ctrlman = m_Map.GetCtrlMan();
var poiman = ctrlman.GetPOIMan();
var poigroup = poiman.FindGroup(1); // Group ID가 1인 Group를 찾는다.
if (poigroup) {
    poigroup.NewGroup(1);   // 새 그룹 생성
}

var tag = 12345;
group.SetTag(tag);

...

tag = group.GetTag();

#include "CXCtrlMan.h"
#include "CXPOIMan.h"
#include "CXPOIGroup.h"

CXCtrlMan ctrlman = m_Map.GetCtrlMan();
CXPOIMan poiman = ctrlMan.GetPOIMan();
CXPOIGroup poigroup = poiman.FindGroup(1);  // Group ID가 1인 Group를 찾는다.
if (poigroup.m_lpDispatch == NULL)
{
	poigroup = poiman.NewGroup(1);  // 새 그룹 생성
}

long lTag = 12345;
group.SetTag(lTag);

...

lTag = group.GetTag();