byte [] buffer = Converter.wcsToMbcs (null, chars, false);
byte [] buffer = Converter.wcsToMbcs (null, chars, true);
public void setText (String string) {	checkWidget();	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);	if ((style & SWT.SEPARATOR) != 0) return;	super.setText (string);	if (labelHandle == 0) return;	char [] chars = fixMnemonic (string);	byte [] buffer = Converter.wcsToMbcs (null, chars, false);	OS.gtk_label_set_text_with_mnemonic (labelHandle, buffer);	if (string.length () != 0) {		OS.gtk_widget_show (labelHandle);	} else {		OS.gtk_widget_hide (labelHandle);	}}