Bug 272616 GB18030: 4-byte GB18030 displayed as ? in SWT Clipboard RTFTransfer.
examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/clipboard/ClipboardExample.java
b = new Button(pasteParent, SWT.PUSH);
	b.setText("Paste");
	b.addSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			String data = (String)clipboard.getContents(TextTransfer.getInstance());
			if (data != null && data.length() > 0) {
				status.setText("");
				pasteText.setText("begin paste>"+data+"<end paste");
			} else {
				status.setText("nothing to paste");
			}
		}
	});
}
void createRTFTransfer(Composite copyParent, Composite pasteParent){
	
	Label l = new Label(copyParent, SWT.NONE);
	l.setText("RTFTransfer:"); 
	final Text copyRtfText = new Text(copyParent, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
	copyRtfText.setText("some\nrtf\ntext");
	GridData data = new GridData(GridData.FILL_HORIZONTAL);
	data.heightHint = data.widthHint = SIZE;
	copyRtfText.setLayoutData(data);
	Button b = new Button(copyParent, SWT.PUSH);
	b.setText("Copy");
	b.addSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			String data = copyRtfText.getText();
			if (data.length() > 0) {
				status.setText("");