gt: 		if (type == OS.MB_RETRYCANCEL) {
context: /*******************************************************************************
   * Copyright (c) 2000, 2015 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.swt.widgets;
  
  
  import org.eclipse.swt.internal.win32.*;
  import org.eclipse.swt.*;
  
  /**
   * Instances of this class are used to inform or warn the user.
   * <dl>
   * <dt><b>Styles:</b></dt>
   * <dd>ICON_ERROR, ICON_INFORMATION, ICON_QUESTION, ICON_WARNING, ICON_WORKING</dd>
   * <dd>OK, OK | CANCEL</dd>
   * <dd>YES | NO, YES | NO | CANCEL</dd>
   * <dd>RETRY | CANCEL</dd>
   * <dd>ABORT | RETRY | IGNORE</dd>
   * <dt><b>Events:</b></dt>
   * <dd>(none)</dd>
   * </dl>
   * <p>
   * Note: Only one of the styles ICON_ERROR, ICON_INFORMATION, ICON_QUESTION,
   * ICON_WARNING and ICON_WORKING may be specified.
   * </p><p>
   * IMPORTANT: This class is <em>not</em> intended to be subclassed.
   * </p>
   *
   * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a>
   * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
   * @noextend This class is not intended to be subclassed by clients.
   */
  public  class MessageBox extends Dialog {
  	String message = "";
  	
  /**
   * Constructs a new instance of this class given only its parent.
   *
   * @param parent a shell which will be the parent of the new instance
   *
   * @exception IllegalArgumentException <ul>
   *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
   * </ul>
   * @exception SWTException <ul>
   *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
   *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
   * </ul>
   */
  public MessageBox (Shell parent) {
  	this (parent, SWT.OK | SWT.ICON_INFORMATION | SWT.APPLICATION_MODAL);
  }
  
  /**
   * Constructs a new instance of this class given its parent
   * and a style value describing its behavior and appearance.
   * <p>
   * The style value is either one of the style constants defined in
   * class <code>SWT</code> which is applicable to instances of this
   * class, or must be built by <em>bitwise OR</em>'ing together 
   * (that is, using the <code>int</code> "|" operator) two or more
   * of those <code>SWT</code> style constants. The class description
   * lists the style constants that are applicable to the class.
   * Style bits are also inherited from superclasses.
   *
   * @param parent a shell which will be the parent of the new instance
   * @param style the style of dialog to construct
   *
   * @exception IllegalArgumentException <ul>
   *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
   * </ul>
   * @exception SWTException <ul>
   *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
   *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
   * </ul>
   * 
   * @see SWT#ICON_ERROR
   * @see SWT#ICON_INFORMATION
   * @see SWT#ICON_QUESTION
   * @see SWT#ICON_WARNING
   * @see SWT#ICON_WORKING
   * @see SWT#OK
   * @see SWT#CANCEL
   * @see SWT#YES
   * @see SWT#NO
   * @see SWT#ABORT
   * @see SWT#RETRY
   * @see SWT#IGNORE
   */
  public MessageBox (Shell parent, int style) {
  	super (parent, checkStyle (parent, checkStyle (style)));
  	checkSubclass ();
  }
  
  static int checkStyle (int style) {
  	int mask = (SWT.YES | SWT.NO | SWT.OK | SWT.CANCEL | SWT.ABORT | SWT.RETRY | SWT.IGNORE);
  	int bits = style & mask;
  	if (bits == SWT.OK || bits == SWT.CANCEL || bits == (SWT.OK | SWT.CANCEL)) return style;
  	if (bits == SWT.YES || bits == SWT.NO || bits == (SWT.YES | SWT.NO) || bits == (SWT.YES | SWT.NO | SWT.CANCEL)) return style;
  	if (bits == (SWT.RETRY | SWT.CANCEL) || bits == (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) return style;
  	style = (style & ~mask) | SWT.OK;
  	return style;
  }
  
  /**
   * Returns the dialog's message, or an empty string if it does not have one.
   * The message is a description of the purpose for which the dialog was opened.
   * This message will be visible in the dialog while it is open.
   *
   * @return the message
   */
  public String getMessage () {
  	return message;
  }
  
  /**
   * Makes the dialog visible and brings it to the front
   * of the display.
   *
   * @return the ID of the button that was selected to dismiss the
   *         message box (e.g. SWT.OK, SWT.CANCEL, etc.)
   *
   * @exception SWTException <ul>
   *    <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
   *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
   * </ul>
   */
  public int open () {
  
  	/* Compute the MessageBox style */
  	int buttonBits = 0;
  	if ((style & SWT.OK) == SWT.OK) buttonBits = OS.MB_OK;
  	if ((style & (SWT.OK | SWT.CANCEL)) == (SWT.OK | SWT.CANCEL)) buttonBits = OS.MB_OKCANCEL;
  	if ((style & (SWT.YES | SWT.NO)) == (SWT.YES | SWT.NO)) buttonBits = OS.MB_YESNO;
  	if ((style & (SWT.YES | SWT.NO | SWT.CANCEL)) == (SWT.YES | SWT.NO | SWT.CANCEL)) buttonBits = OS.MB_YESNOCANCEL;
  	if ((style & (SWT.RETRY | SWT.CANCEL)) == (SWT.RETRY | SWT.CANCEL)) buttonBits = OS.MB_RETRYCANCEL;
  	if ((style & (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) == (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) buttonBits = OS.MB_ABORTRETRYIGNORE;
  	if (buttonBits == 0) buttonBits = OS.MB_OK;
  
  	int iconBits = 0;
  	if ((style & SWT.ICON_ERROR) != 0) iconBits = OS.MB_ICONERROR;
  	if ((style & SWT.ICON_INFORMATION) != 0) iconBits = OS.MB_ICONINFORMATION;
  	if ((style & SWT.ICON_QUESTION) != 0) iconBits = OS.MB_ICONQUESTION;
  	if ((style & SWT.ICON_WARNING) != 0) iconBits = OS.MB_ICONWARNING;
  	if ((style & SWT.ICON_WORKING) != 0) iconBits = OS.MB_ICONINFORMATION;
  
  	/* Only MB_APPLMODAL is supported on WinCE */
  	int modalBits = 0;
  	if (OS.IsWinCE) {
  		if ((style & (SWT.PRIMARY_MODAL | SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) {
  			modalBits = OS.MB_APPLMODAL;
  		}
  	} else {
  		if ((style & SWT.PRIMARY_MODAL) != 0) modalBits = OS.MB_APPLMODAL;
  		if ((style & SWT.APPLICATION_MODAL) != 0) modalBits = OS.MB_TASKMODAL;
  		if ((style & SWT.SYSTEM_MODAL) != 0) modalBits = OS.MB_SYSTEMMODAL;
  	}
  
  	int bits = buttonBits | iconBits | modalBits;
  	if ((style & SWT.RIGHT_TO_LEFT) != 0) bits |= OS.MB_RTLREADING | OS.MB_RIGHT;
  	if ((style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT)) == 0) {
  		if (parent != null && (parent.style & SWT.MIRRORED) != 0) {
  			bits |= OS.MB_RTLREADING | OS.MB_RIGHT;
  		}
  	}
  	
  	/*
  	* Feature in Windows.  System modal is not supported
  	* on Windows 95 and NT.  The fix is to convert system
  	* modal to task modal.
  	*/
  	if ((bits & OS.MB_SYSTEMMODAL) != 0) {
  		bits |= OS.MB_TASKMODAL;
  		bits &= ~OS.MB_SYSTEMMODAL;
  		/* Force a system modal message box to the front */
  		bits |= OS.MB_TOPMOST;
  	}
  
  	/*
  	* Feature in Windows.  In order for MB_TASKMODAL to work,
  	* the parent HWND of the MessageBox () call must be NULL.
  	* If the parent is not NULL, MB_TASKMODAL behaves the
  	* same as MB_APPLMODAL.  The fix to set the parent HWND
  	* anyway and not rely on MB_MODAL to work by making the
  	* parent be temporarily modal. 
  	*/
  	long /*int*/ hwndOwner = parent != null ? parent.handle : 0;
  	Display display = parent != null ? parent.getDisplay (): Display.getCurrent ();
  	Dialog oldModal = null;
  	if ((bits & OS.MB_TASKMODAL) != 0) {
  		oldModal = display.getModalDialog ();
  		display.setModalDialog (this);
  	}
  
  	/* Open the message box */
  	display.sendPreExternalEventDispatchEvent ();
  	/* Use the character encoding for the default locale */
  	TCHAR buffer1 = new TCHAR (0, message, true);
  	TCHAR buffer2 = new TCHAR (0, title, true);
  	int code = OS.MessageBox (hwndOwner, buffer1, buffer2, bits);
  	display.sendPostExternalEventDispatchEvent ();
  	
  	/* Clear the temporarily dialog modal parent */
  	if ((bits & OS.MB_TASKMODAL) != 0) {
  		display.setModalDialog (oldModal);
  	}
  	
  	/*
  	* This code is intentionally commented.  On some
  	* platforms, the owner window is repainted right
  	* away when a dialog window exits.  This behavior
  	* is currently unspecified.
  	*/
  //	if (hwndOwner != 0) OS.UpdateWindow (hwndOwner);
  	
  	/* Compute and return the result */
  	if (code != 0) {
  		int type = bits & 0x0F;
  		if (type == OS.MB_OK) return SWT.OK;
  		if (type == OS.MB_OKCANCEL) {
  			return (code == OS.IDOK) ? SWT.OK : SWT.CANCEL;
  		}
  		if (type == OS.MB_YESNO) {
  			return (code == OS.IDYES) ? SWT.YES : SWT.NO;
  		}
  		if (type == OS.MB_YESNOCANCEL) {
  			if (code == OS.IDYES) return SWT.YES;
  			if (code == OS.IDNO) return SWT.NO;
  			return SWT.CANCEL;
  		}
  