listbox funxt niet

[listbox funxt niet]

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static	HWND hList;
	char tchBuffer[2]="";
	switch (message) 
	{
	case WM_DRAWITEM:
		{
			int len;
			LPDRAWITEMSTRUCT lpdis = (LPDRAWITEMSTRUCT) lParam; 

            if (lpdis->itemID == -1)            break; 
        	switch (lpdis->itemAction) 
            { 
                case ODA_DRAWENTIRE: 
					len=SendMessage(hList, LB_GETTEXT, 0, (long)tchBuffer); 
				    MessageBox(0,tchBuffer,0,0);	//kommt nur muell
            }; 
    		break;
		}
	case WM_CREATE:
		{
			s.cbSize=sizeof(SCROLLINFO);
			s.fMask=SIF_ALL;
			hList=CreateWindow("listbox",0,WS_CHILD|WS_VISIBLE|WS_VSCROLL|LBS_OWNERDRAWFIXED ,
			100,100,100,100,hWnd,(HMENU)23,hInst,0);
			SendMessage(hList, LB_ADDSTRING, 0, (LPARAM) "a");
			SendMessage(hList, LB_ADDSTRING, 1, (LPARAM) "b");
			break;
		}

Ich bekomme die werte nicht aus der listbox.

[miller_m]

long nLen;
nLen = SendMessage(hList, LB_GETTEXTLEN, (WPARAM)0, 0);
char *pText= new char[nLen + 1];
SendMessage(hList, LB_GETTEXT, (WPARAM)0, (LPARAM)pText);

zum nachlesen
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/listboxes/listboxreference/listboxmessages/lb_gettext.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/listboxes/listboxreference/listboxmessages/lb_gettextlen.asp

[edit]
links und nicht vergessen speicher wieder zu löschen