Ich probiere es schon zum zweiten mal, abber irgendwas klappt nie...

snippsel Dir raus was Du brauchst ...

void refresh_user_tree(HWND hTree, CMessage msg)
{
	#define CX_ICON	20
	#define CY_ICON	20
	#define NUM_ICONS	2

	HIMAGELIST himlIcons;  // handle to new image list 
    HICON hicon;           // handle to icon 

	TVINSERTSTRUCT is;
	string strBeg, strEnd, strUser;
	int nPos, nBeg, nEnd;
	nPos = nBeg = nEnd = 0;
	strBeg = "<u>";
	strEnd = "</u>";

	TreeView_SetImageList(hTree, NULL, TVSIL_NORMAL);

	himlIcons = ImageList_Create(CX_ICON, CY_ICON, ILC_MASK, NUM_ICONS, 0); 

	hicon = LoadIcon(g_hInstance, MAKEINTRESOURCE(IDI_OFFLINE)); 
	ImageList_AddIcon(himlIcons, hicon);

	hicon = LoadIcon(g_hInstance, MAKEINTRESOURCE(IDI_ONLINE));
    ImageList_AddIcon(himlIcons, hicon);

	TreeView_SetImageList(hTree, himlIcons, TVSIL_NORMAL);

	TreeView_DeleteItem(hTree, TVI_ROOT);
	while((nBeg=msg.m_str_Msg.find(strBeg.c_str(),nPos)) > -1)
	{
		if( nBeg > 0 && nPos == nBeg ) 
			break;

		nBeg += strBeg.length();
		nEnd=msg.m_str_Msg.find(strEnd, nBeg);
		if( nEnd == -1 || nEnd == nBeg ) 
			break;

		strUser = msg.m_str_Msg.substr(nBeg, nEnd-nBeg);
		nPos = strUser.find_last_of('@');
		if( nPos > 0 )
		{
			string strOnline = strUser.substr(nPos+1);
			strUser = strUser.substr(0, nPos);

			memset(&is, 0, sizeof(is));

			if( strOnline[0] == '0' ) 
			{
				strUser += ":offline";
				is.itemex.iImage = 0;
			}
			if( strOnline[0] == '1' ) 
			{
				strUser += ":online";
				is.itemex.iImage = 1;
			}
			is.hParent = TVI_ROOT;
			is.hInsertAfter = TVI_LAST;
			is.itemex.mask = TVIF_TEXT|TVIF_IMAGE|TVIF_SELECTEDIMAGE|TVIF_PARAM;
			is.itemex.hItem;
			is.itemex.state;
			is.itemex.stateMask;
			is.itemex.pszText = (char*)strUser.c_str();
			is.itemex.cchTextMax = strUser.length();
			//is.itemex.iImage;
			is.itemex.iSelectedImage = is.itemex.iImage;
			is.itemex.cChildren;
			is.itemex.lParam;
			is.itemex.iIntegral;
			TreeView_InsertItem(hTree, &is);
		}
		nPos = nBeg;
	}
}

Viel Erfolg.
RB