wineItem->textWidth=0;/* force width recalculation */
if(tvItem->pszText!=LPSTR_TEXTCALLBACKW)/* covers != TEXTCALLBACKA too */
if(tvItem->pszText!=LPSTR_TEXTCALLBACKW&&tvItem->pszText!=NULL)/* covers != TEXTCALLBACKA too, and undocumented: pszText of NULL also means TEXTCALLBACK */