SHFILEINFO shFileInfo;
   HIMAGELIST himl;

   ZeroMemory(&shFileInfo , sizeof(SHFILEINFO));

   himl =(HIMAGELIST)SHGetFileInfo(strDrive.c_str(),NULL,&shFileInfo,sizeof(shFileInfo),
        SHGFI_SMALLICON | SHGFI_ICONLOCATION | SHGFI_SYSICONINDEX | SHGFI_TYPENAME);

    HICON SmallIcon;
    TIcon* icon;
    SmallIcon = shFileInfo.hIcon;

    icon = new TIcon;
    icon->Handle = SmallIcon;

    int num;

        num = T_IMGLIST_TREEVIEW->AddIcon(icon);


    DestroyIcon(SmallIcon);
    delete icon;

   TTreeNode* pNode;
   pNode = TreeView1->Items->Add(NULL, a);
   pNode->ImageIndex =num ;
   pNode->SelectedIndex =num ;

T_IMGLIST_TREEVIEW << 이 이미지를 treeview 와 연동을 시켜놓았습니다 .
하지만 AddIcon 에서 계속 -1값을 반환 하내요. ㅠㅠ