Bug 93175 [Preferences] PreferencePage.createControl is tagged as experimental
build I20050426 PreferencePage.createControl in JFace still states: * <strong>NOTE:</strong> This API is experimental * and subject to change before the 3.1 release. Should remove this for M7.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferencePage.java
content.setLayout(layout);
        
        applyDialogFont(content);
        
        initializeDialogUnits(content);
        descriptionLabel = createDescriptionLabel(content);
        if (descriptionLabel != null) {
            descriptionLabel.setLayoutData(new GridData(
                    GridData.FILL_HORIZONTAL));
        }
        body = createContents(content);
        if (body != null)
            
            body.setLayoutData(new GridData(GridData.FILL_BOTH));
        Composite buttonBar = new Composite(content, SWT.NONE);
        layout = new GridLayout();
        layout.numColumns = 0;
        layout.marginHeight = 0;
        layout.marginWidth = 0;
        layout.makeColumnsEqualWidth = false;
        buttonBar.setLayout(layout);
        
        if(createMessageArea){
        	layout.numColumns = layout.numColumns + 1;
        	createMessageArea(buttonBar);
        	gd = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL);
        }    
        else
        	 gd = new GridData(GridData.HORIZONTAL_ALIGN_END);