Bug 81254 ControlExample spews warnings
observed on Solaris and hpux - run the ControlExample with warnings turned on (do this in Device I think) - a scrollbar warning is spewed on each page that's shown - this is ugly when using the swt-only download since warning messages are not supressed in this context
examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/controlexample/CanvasTab.java
void createExampleGroup () {
		super.createExampleGroup ();
		
		
		canvasGroup = new Group (exampleGroup, SWT.NONE);
		canvasGroup.setLayout (new GridLayout ());
		canvasGroup.setLayoutData (new GridData (GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL));
		canvasGroup.setText ("Canvas");
	}
	
	/**
	 * Creates the "Example" widgets.
	 */
	void createExampleWidgets () {
		
		
		int style = getDefaultStyle();
		if (horizontalButton.getSelection ()) style |= SWT.H_SCROLL;
		if (verticalButton.getSelection ()) style |= SWT.V_SCROLL;
		if (borderButton.getSelection ()) style |= SWT.BORDER;
		if (noBackgroundButton.getSelection ()) style |= SWT.NO_BACKGROUND;
		if (noFocusButton.getSelection ()) style |= SWT.NO_FOCUS;
		if (noMergePaintsButton.getSelection ()) style |= SWT.NO_MERGE_PAINTS;
		if (noRedrawResizeButton.getSelection ()) style |= SWT.NO_REDRAW_RESIZE;
		
		paintCount = 0; cx = 0; cy = 0;
		canvas = new Canvas (canvasGroup, style);
		canvas.addPaintListener(new PaintListener () {
			public void paintControl(PaintEvent e) {
				paintCount++;