Antialiasing with WM

Hi,

Could you tell me how I can use for example

GUI_SetColor(GUI_GREEN);      GUI_SetPenSize(5);      GUI_AA_DrawRoundedRect(10, 10, 50, 50, 5);

in a callback function static void _cbDialog(WM_MESSAGE * pMsg).

I try draw GUI_AA_DrawRoundedRect() without WM - result success. But with Window Manager I can't reach success result. Is there a way using 2D graphics or antialiasing functions with WM?


And why when I using this I have no draw rectangle
case WM_USER:
hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
TEXT_SetTextColor(hItem, GUI_WHITE);
TEXT_SetText(hItem, pMsg->Data.p);
TEXT_SetFont(hItem, &GUI_FontArialNarrow16);

GUI_SetColor(GUI_GREEN);
GUI_SetPenSize(5);
GUI_AA_DrawRoundedRect(10, 10, 50, 50, 5); break;


But If I using in next way I see success draw rectangle(why it's happen, what differences)?
case WM_USER:
hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
TEXT_SetTextColor(hItem, GUI_WHITE); TEXT_SetText(hItem, pMsg->Data.p);
TEXT_SetFont(hItem, &GUI_FontArialNarrow16);
break;
case WM_PAINT:
GUI_SetColor(GUI_GREEN);
GUI_SetPenSize(5);
GUI_AA_DrawRoundedRect(10, 10, 50, 50, 5);
break;