C++ (Qt)
void setRowBold( int row, QTableWidget* tw )
{
QFont fnt( tw->font() );
fnt.setBold( true );
#if 1
for( int col = 0; col < tw->model()->columnCount(); col++ )
tw->model()->setData( tw->model()->index( row, col ), fnt, Qt::FontRole );
#else
for( int col = 0; col < tw->columnCount(); col++ )
tw->item( row, col )->setData( Qt::FontRole, fnt );
#endif
}