1 files changed, 376 insertions, 376 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Scrollable.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Scrollable.java
index 00aff6bc5e..b6b542001a 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Scrollable.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Scrollable.java
@@ -1,379 +1,379 @@
-package org.eclipse.swt.widgets;
-
-/*
+package org.eclipse.swt.widgets;
+
+/*
  * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
  * This file is made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- */
-
-import org.eclipse.swt.internal.win32.*;
-import org.eclipse.swt.*;
-import org.eclipse.swt.graphics.*;
-
-/**
- * This class is the abstract superclass of all classes which
- * represent controls that have standard scroll bars.
- * <dl>
- * <dt><b>Styles:</b></dt>
- * <dd>H_SCROLL, V_SCROLL</dd>
- * <dt><b>Events:</b>
- * <dd>(none)</dd>
- * </dl>
- * <p>
- * IMPORTANT: This class is intended to be subclassed <em>only</em>
- * within the SWT implementation.
- * </p>
- */
-
-public abstract class Scrollable extends Control {
-	ScrollBar horizontalBar, verticalBar;
-
-/**
- * Prevents uninitialized instances from being created outside the package.
- */
-Scrollable () {
-}
-
-/**
- * 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.
- * </p>
- *
- * @param parent a composite control which will be the parent of the new instance (cannot be null)
- * @param style the style of control 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#H_SCROLL
- * @see SWT#V_SCROLL
- * @see Widget#checkSubclass
- * @see Widget#getStyle
- */
-public Scrollable (Composite parent, int style) {
-	super (parent, style);
-}
-
-int callWindowProc (int msg, int wParam, int lParam) {
-	if (handle == 0) return 0;
-	return OS.DefWindowProc (handle, msg, wParam, lParam);
-}
-
-/**
- * Given a desired <em>client area</em> for the receiver
- * (as described by the arguments), returns the bounding
- * rectangle which would be required to produce that client
- * area.
- * <p>
- * In other words, it returns a rectangle such that, if the
- * receiver's bounds were set to that rectangle, the area
- * of the receiver which is capable of displaying data
- * (that is, not covered by the "trimmings") would be the
- * rectangle described by the arguments (relative to the
- * receiver's parent).
- * </p>
- * 
- * @return the required bounds to produce the given client area
- *
- * @exception SWTException <ul>
- *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
- *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
- * </ul>
- *
- * @see #getClientArea
- */
-public Rectangle computeTrim (int x, int y, int width, int height) {
-	checkWidget ();
-	RECT rect = new RECT ();
-	OS.SetRect (rect, x, y, x + width, y + height);
-	int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
-	OS.AdjustWindowRectEx (rect, bits, false, OS.GetWindowLong (handle, OS.GWL_EXSTYLE));
-	if (horizontalBar != null) rect.bottom += OS.GetSystemMetrics (OS.SM_CYHSCROLL);
-	if (verticalBar != null) rect.right += OS.GetSystemMetrics (OS.SM_CXVSCROLL);
-	int nWidth = rect.right - rect.left, nHeight = rect.bottom - rect.top;
-	return new Rectangle (rect.left, rect.top, nWidth, nHeight);
-}
-
-ScrollBar createScrollBar (int type) {
-	ScrollBar bar = new ScrollBar (this, type);
-	if ((state & CANVAS) != 0) {
-		bar.setMaximum (100);
-		bar.setThumb (10);
-	}
-	return bar;
-}
-
-void createWidget () {
-	super.createWidget ();
-	if ((style & SWT.H_SCROLL) != 0) horizontalBar = createScrollBar (SWT.H_SCROLL);
-	if ((style & SWT.V_SCROLL) != 0) verticalBar = createScrollBar (SWT.V_SCROLL);
-}
-
-/**
- * Returns a rectangle which describes the area of the
- * receiver which is capable of displaying data (that is,
- * not covered by the "trimmings").
- * 
- * @return the client area
- *
- * @exception SWTException <ul>
- *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
- *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
- * </ul>
- *
- * @see #computeTrim
- */
-public Rectangle getClientArea () {
-	checkWidget ();
-	forceResize ();
-	RECT rect = new RECT ();
-	OS.GetClientRect (handle, rect);
-	return new Rectangle (0, 0, rect.right, rect.bottom);
-}
-
-/**
- * Returns the receiver's horizontal scroll bar if it has
- * one, and null if it does not.
- *
- * @return the horizontal scroll bar (or null)
- *
- * @exception SWTException <ul>
- *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
- *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
- * </ul>
- */
-public ScrollBar getHorizontalBar () {
-	checkWidget ();
-	return horizontalBar;
-}
-
-/**
- * Returns the receiver's vertical scroll bar if it has
- * one, and null if it does not.
- *
- * @return the vertical scroll bar (or null)
- *
- * @exception SWTException <ul>
- *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
- *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
- * </ul>
- */
-public ScrollBar getVerticalBar () {
-	checkWidget ();
-	return verticalBar;
-}
-
-void releaseWidget () {
-	if (horizontalBar != null) horizontalBar.releaseResources ();
-	if (verticalBar != null) verticalBar.releaseResources ();
-	horizontalBar = verticalBar = null;
-	super.releaseWidget ();
-}
-
-int widgetExtStyle () {
-	return super.widgetExtStyle ();
-	/*
-	* This code is intentionally commented.  In future,
-	* we may wish to support different standard Windows
-	* edge styles.  The issue here is that not all of
-	* these styles are available on the other platforms
-	* this would need to be a hint.
-	*/
-//	if ((style & SWT.BORDER) != 0) return OS.WS_EX_CLIENTEDGE;
-//	if ((style & SWT.SHADOW_IN) != 0) return OS.WS_EX_STATICEDGE;
-//	return super.widgetExtStyle ();
-}
-
-int widgetStyle () {
-	int bits = super.widgetStyle () | OS.WS_TABSTOP;
-	if ((style & SWT.H_SCROLL) != 0) bits |= OS.WS_HSCROLL;
-	if ((style & SWT.V_SCROLL) != 0) bits |= OS.WS_VSCROLL;
-	return bits;
-}
-
-TCHAR windowClass () {
-	return getDisplay ().windowClass;
-}
-
-int windowProc () {
-	return getDisplay ().windowProc;
-}
-
-LRESULT WM_HSCROLL (int wParam, int lParam) {
-	LRESULT result = super.WM_HSCROLL (wParam, lParam);
-	if (result != null) return result;
-	
-	/*
-	* Bug on WinCE.  lParam should be NULL when the message is not sent
-	* by a scroll bar control, but it contains the handle to the window.
-	* When the message is sent by a scroll bar control, it correctly
-	* contains the handle to the scroll bar.  The fix is to check for
-	* both.
-	*/
-	if ((lParam == 0 || lParam == handle) && horizontalBar != null) {
-		return wmScroll (horizontalBar, OS.WM_HSCROLL, wParam, lParam);
-	}
-	return result;
-}
-
-LRESULT WM_MOUSEWHEEL (int wParam, int lParam) {
-	LRESULT result = super.WM_MOUSEWHEEL (wParam, lParam);
-	if (result != null) return result;
-	
-	/*
-	* Translate WM_MOUSEWHEEL to WM_VSCROLL or WM_HSCROLL.
-	*/
-	if ((state & CANVAS) != 0) {
-		if ((wParam & (OS.MK_SHIFT | OS.MK_CONTROL)) != 0) return result;
-		boolean vertical = verticalBar != null && verticalBar.getEnabled ();
-		boolean horizontal = horizontalBar != null && horizontalBar.getEnabled ();
-		int msg = (vertical) ? OS.WM_VSCROLL : (horizontal) ? OS.WM_HSCROLL : 0;
-		if (msg == 0) return result;
-		int [] value = new int [1];
-		OS.SystemParametersInfo (OS.SPI_GETWHEELSCROLLLINES, 0, value, 0);
-		int delta = (short) (wParam >> 16);
-		int code = 0, count = 0;
-  		if (value [0] == OS.WHEEL_PAGESCROLL) {	
-   			code = delta < 0 ? OS.SB_PAGEDOWN : OS.SB_PAGEUP;
-   			count = 1;
-  		} else {
-  			code = delta < 0 ? OS.SB_LINEDOWN : OS.SB_LINEUP;
-  			delta = Math.abs (delta);
-  			if (delta < OS.WHEEL_DELTA) return result;
-  			if (msg == OS.WM_VSCROLL) {
-  				count = value [0] * delta / OS.WHEEL_DELTA;
-  			} else {
-  				count = delta / OS.WHEEL_DELTA;
-  			}
-  		}
-		for (int i=0; i<count; i++) {
-			OS.SendMessage (handle, msg, code, 0);
-		}
-		return LRESULT.ZERO;
-	}
-		
-	/*
-	* When the native widget scrolls inside WM_MOUSEWHEEL, it
-	* may or may not send a WM_VSCROLL or WM_HSCROLL to do the
-	* actual scrolling.  This depends on the implementation of
-	* each native widget.  In order to ensure that application
-	* code is notified when the scroll bar moves, compare the
-	* scroll bar position before and after the WM_MOUSEWHEEL.
-	* If the native control sends a WM_VSCROLL or WM_HSCROLL,
-	* then the application has already been notified.  If not
-	* explicity send the event.
-	*/
-	int vPosition = verticalBar == null ? 0 : verticalBar.getSelection ();
-	int hPosition = horizontalBar == null ? 0 : horizontalBar.getSelection ();
-	int code = callWindowProc (OS.WM_MOUSEWHEEL, wParam, lParam);
-	if (verticalBar != null) {
-		int position = verticalBar.getSelection ();
-		if (position != vPosition) {
-			Event event = new Event ();
-			event.detail = position < vPosition ? SWT.PAGE_UP : SWT.PAGE_DOWN; 
-			verticalBar.sendEvent (SWT.Selection, event);
-		}
-	}
-	if (horizontalBar != null) {
-		int position = horizontalBar.getSelection ();
-		if (position != hPosition) {
-			Event event = new Event ();
-			event.detail = position < hPosition ? SWT.PAGE_UP : SWT.PAGE_DOWN; 
-			horizontalBar.sendEvent (SWT.Selection, event);
-		}
-	}
-	return new LRESULT (code);
-}
-
-LRESULT WM_SIZE (int wParam, int lParam) {
-	int code = callWindowProc (OS.WM_SIZE, wParam, lParam);
-	super.WM_SIZE (wParam, lParam);
-	// widget may be disposed at this point
-	if (code == 0) return LRESULT.ZERO;
-	return new LRESULT (code);
-}
-
-LRESULT WM_VSCROLL (int wParam, int lParam) {
-	LRESULT result = super.WM_VSCROLL (wParam, lParam);
-	if (result != null) return result;
-
-	/*
-	* Bug on WinCE.  lParam should be NULL when the message is not sent
-	* by a scroll bar control, but it contains the handle to the window.
-	* When the message is sent by a scroll bar control, it correctly
-	* contains the handle to the scroll bar.  The fix is to check for
-	* both.
-	*/
-	if ((lParam == 0 || lParam == handle) && verticalBar != null) {
-		return wmScroll (verticalBar, OS.WM_VSCROLL, wParam, lParam);
-	}
-	return result;
-}
-
-LRESULT wmScroll (ScrollBar bar, int msg, int wParam, int lParam) {
-	LRESULT result = null;
-	if ((state & CANVAS) != 0) {
-		int type = msg == OS.WM_HSCROLL ? OS.SB_HORZ : OS.SB_VERT;
-		SCROLLINFO info = new SCROLLINFO ();
-		info.cbSize = SCROLLINFO.sizeof;
-		info.fMask = OS.SIF_TRACKPOS | OS.SIF_POS | OS.SIF_RANGE;
-		OS.GetScrollInfo (handle, type, info);
-		info.fMask = OS.SIF_POS;
-		int code = wParam & 0xFFFF;
-		switch (code) {
-			case OS.SB_ENDSCROLL:  return null;
-			case OS.SB_THUMBTRACK:
-			case OS.SB_THUMBPOSITION:
-				/* 
-				* Note: On WinCE, the value in SB_THUMBPOSITION is relative to nMin.
-				* Same for SB_THUMBPOSITION 'except' for the very first thumb track
-				* message which has the actual value of nMin. This is a problem when
-				* nMin is not zero.
-				*/
-				info.nPos = info.nTrackPos;
-				break;
-			case OS.SB_TOP:
-				info.nPos = info.nMin;
-				break;
-			case OS.SB_BOTTOM:
-				info.nPos = info.nMax;
-				break;
-			case OS.SB_LINEDOWN:
-				info.nPos += bar.getIncrement ();
-				break;
-			case OS.SB_LINEUP:
-				int increment = bar.getIncrement ();
-				info.nPos = Math.max (info.nMin, info.nPos - increment);
-				break;
-			case OS.SB_PAGEDOWN:
-				info.nPos += bar.getPageIncrement ();
-				break;
-			case OS.SB_PAGEUP:
-				int pageIncrement = bar.getPageIncrement ();
-				info.nPos = Math.max (info.nMin, info.nPos - pageIncrement);
-				break;
-		}
-		OS.SetScrollInfo (handle, type, info, true);
-	} else {
-		int code = callWindowProc (msg, wParam, lParam);
-		result = code == 0 ? LRESULT.ZERO : new LRESULT (code);
-	}
-	bar.wmScrollChild (wParam, lParam);
-	return result;
-}
-
-}
+ * http://www.eclipse.org/legal/cpl-v10.html
+ */
+
+import org.eclipse.swt.internal.win32.*;
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+
+/**
+ * This class is the abstract superclass of all classes which
+ * represent controls that have standard scroll bars.
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>H_SCROLL, V_SCROLL</dd>
+ * <dt><b>Events:</b>
+ * <dd>(none)</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is intended to be subclassed <em>only</em>
+ * within the SWT implementation.
+ * </p>
+ */
+
+public abstract class Scrollable extends Control {
+	ScrollBar horizontalBar, verticalBar;
+
+/**
+ * Prevents uninitialized instances from being created outside the package.
+ */
+Scrollable () {
+}
+
+/**
+ * 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.
+ * </p>
+ *
+ * @param parent a composite control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control 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#H_SCROLL
+ * @see SWT#V_SCROLL
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public Scrollable (Composite parent, int style) {
+	super (parent, style);
+}
+
+int callWindowProc (int msg, int wParam, int lParam) {
+	if (handle == 0) return 0;
+	return OS.DefWindowProc (handle, msg, wParam, lParam);
+}
+
+/**
+ * Given a desired <em>client area</em> for the receiver
+ * (as described by the arguments), returns the bounding
+ * rectangle which would be required to produce that client
+ * area.
+ * <p>
+ * In other words, it returns a rectangle such that, if the
+ * receiver's bounds were set to that rectangle, the area
+ * of the receiver which is capable of displaying data
+ * (that is, not covered by the "trimmings") would be the
+ * rectangle described by the arguments (relative to the
+ * receiver's parent).
+ * </p>
+ * 
+ * @return the required bounds to produce the given client area
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see #getClientArea
+ */
+public Rectangle computeTrim (int x, int y, int width, int height) {
+	checkWidget ();
+	RECT rect = new RECT ();
+	OS.SetRect (rect, x, y, x + width, y + height);
+	int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
+	OS.AdjustWindowRectEx (rect, bits, false, OS.GetWindowLong (handle, OS.GWL_EXSTYLE));
+	if (horizontalBar != null) rect.bottom += OS.GetSystemMetrics (OS.SM_CYHSCROLL);
+	if (verticalBar != null) rect.right += OS.GetSystemMetrics (OS.SM_CXVSCROLL);
+	int nWidth = rect.right - rect.left, nHeight = rect.bottom - rect.top;
+	return new Rectangle (rect.left, rect.top, nWidth, nHeight);
+}
+
+ScrollBar createScrollBar (int type) {
+	ScrollBar bar = new ScrollBar (this, type);
+	if ((state & CANVAS) != 0) {
+		bar.setMaximum (100);
+		bar.setThumb (10);
+	}
+	return bar;
+}
+
+void createWidget () {
+	super.createWidget ();
+	if ((style & SWT.H_SCROLL) != 0) horizontalBar = createScrollBar (SWT.H_SCROLL);
+	if ((style & SWT.V_SCROLL) != 0) verticalBar = createScrollBar (SWT.V_SCROLL);
+}
+
+/**
+ * Returns a rectangle which describes the area of the
+ * receiver which is capable of displaying data (that is,
+ * not covered by the "trimmings").
+ * 
+ * @return the client area
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see #computeTrim
+ */
+public Rectangle getClientArea () {
+	checkWidget ();
+	forceResize ();
+	RECT rect = new RECT ();
+	OS.GetClientRect (handle, rect);
+	return new Rectangle (0, 0, rect.right, rect.bottom);
+}
+
+/**
+ * Returns the receiver's horizontal scroll bar if it has
+ * one, and null if it does not.
+ *
+ * @return the horizontal scroll bar (or null)
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public ScrollBar getHorizontalBar () {
+	checkWidget ();
+	return horizontalBar;
+}
+
+/**
+ * Returns the receiver's vertical scroll bar if it has
+ * one, and null if it does not.
+ *
+ * @return the vertical scroll bar (or null)
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public ScrollBar getVerticalBar () {
+	checkWidget ();
+	return verticalBar;
+}
+
+void releaseWidget () {
+	if (horizontalBar != null) horizontalBar.releaseResources ();
+	if (verticalBar != null) verticalBar.releaseResources ();
+	horizontalBar = verticalBar = null;
+	super.releaseWidget ();
+}
+
+int widgetExtStyle () {
+	return super.widgetExtStyle ();
+	/*
+	* This code is intentionally commented.  In future,
+	* we may wish to support different standard Windows
+	* edge styles.  The issue here is that not all of
+	* these styles are available on the other platforms
+	* this would need to be a hint.
+	*/
+//	if ((style & SWT.BORDER) != 0) return OS.WS_EX_CLIENTEDGE;
+//	if ((style & SWT.SHADOW_IN) != 0) return OS.WS_EX_STATICEDGE;
+//	return super.widgetExtStyle ();
+}
+
+int widgetStyle () {
+	int bits = super.widgetStyle () | OS.WS_TABSTOP;
+	if ((style & SWT.H_SCROLL) != 0) bits |= OS.WS_HSCROLL;
+	if ((style & SWT.V_SCROLL) != 0) bits |= OS.WS_VSCROLL;
+	return bits;
+}
+
+TCHAR windowClass () {
+	return getDisplay ().windowClass;
+}
+
+int windowProc () {
+	return getDisplay ().windowProc;
+}
+
+LRESULT WM_HSCROLL (int wParam, int lParam) {
+	LRESULT result = super.WM_HSCROLL (wParam, lParam);
+	if (result != null) return result;
+	
+	/*
+	* Bug on WinCE.  lParam should be NULL when the message is not sent
+	* by a scroll bar control, but it contains the handle to the window.
+	* When the message is sent by a scroll bar control, it correctly
+	* contains the handle to the scroll bar.  The fix is to check for
+	* both.
+	*/
+	if ((lParam == 0 || lParam == handle) && horizontalBar != null) {
+		return wmScroll (horizontalBar, OS.WM_HSCROLL, wParam, lParam);
+	}
+	return result;
+}
+
+LRESULT WM_MOUSEWHEEL (int wParam, int lParam) {
+	LRESULT result = super.WM_MOUSEWHEEL (wParam, lParam);
+	if (result != null) return result;
+	
+	/*
+	* Translate WM_MOUSEWHEEL to WM_VSCROLL or WM_HSCROLL.
+	*/
+	if ((state & CANVAS) != 0) {
+		if ((wParam & (OS.MK_SHIFT | OS.MK_CONTROL)) != 0) return result;
+		boolean vertical = verticalBar != null && verticalBar.getEnabled ();
+		boolean horizontal = horizontalBar != null && horizontalBar.getEnabled ();
+		int msg = (vertical) ? OS.WM_VSCROLL : (horizontal) ? OS.WM_HSCROLL : 0;
+		if (msg == 0) return result;
+		int [] value = new int [1];
+		OS.SystemParametersInfo (OS.SPI_GETWHEELSCROLLLINES, 0, value, 0);
+		int delta = (short) (wParam >> 16);
+		int code = 0, count = 0;
+  		if (value [0] == OS.WHEEL_PAGESCROLL) {	
+   			code = delta < 0 ? OS.SB_PAGEDOWN : OS.SB_PAGEUP;
+   			count = 1;
+  		} else {
+  			code = delta < 0 ? OS.SB_LINEDOWN : OS.SB_LINEUP;
+  			delta = Math.abs (delta);
+  			if (delta < OS.WHEEL_DELTA) return result;
+  			if (msg == OS.WM_VSCROLL) {
+  				count = value [0] * delta / OS.WHEEL_DELTA;
+  			} else {
+  				count = delta / OS.WHEEL_DELTA;
+  			}
+  		}
+		for (int i=0; i<count; i++) {
+			OS.SendMessage (handle, msg, code, 0);
+		}
+		return LRESULT.ZERO;
+	}
+		
+	/*
+	* When the native widget scrolls inside WM_MOUSEWHEEL, it
+	* may or may not send a WM_VSCROLL or WM_HSCROLL to do the
+	* actual scrolling.  This depends on the implementation of
+	* each native widget.  In order to ensure that application
+	* code is notified when the scroll bar moves, compare the
+	* scroll bar position before and after the WM_MOUSEWHEEL.
+	* If the native control sends a WM_VSCROLL or WM_HSCROLL,
+	* then the application has already been notified.  If not
+	* explicity send the event.
+	*/
+	int vPosition = verticalBar == null ? 0 : verticalBar.getSelection ();
+	int hPosition = horizontalBar == null ? 0 : horizontalBar.getSelection ();
+	int code = callWindowProc (OS.WM_MOUSEWHEEL, wParam, lParam);
+	if (verticalBar != null) {
+		int position = verticalBar.getSelection ();
+		if (position != vPosition) {
+			Event event = new Event ();
+			event.detail = position < vPosition ? SWT.PAGE_UP : SWT.PAGE_DOWN; 
+			verticalBar.sendEvent (SWT.Selection, event);
+		}
+	}
+	if (horizontalBar != null) {
+		int position = horizontalBar.getSelection ();
+		if (position != hPosition) {
+			Event event = new Event ();
+			event.detail = position < hPosition ? SWT.PAGE_UP : SWT.PAGE_DOWN; 
+			horizontalBar.sendEvent (SWT.Selection, event);
+		}
+	}
+	return new LRESULT (code);
+}
+
+LRESULT WM_SIZE (int wParam, int lParam) {
+	int code = callWindowProc (OS.WM_SIZE, wParam, lParam);
+	super.WM_SIZE (wParam, lParam);
+	// widget may be disposed at this point
+	if (code == 0) return LRESULT.ZERO;
+	return new LRESULT (code);
+}
+
+LRESULT WM_VSCROLL (int wParam, int lParam) {
+	LRESULT result = super.WM_VSCROLL (wParam, lParam);
+	if (result != null) return result;
+
+	/*
+	* Bug on WinCE.  lParam should be NULL when the message is not sent
+	* by a scroll bar control, but it contains the handle to the window.
+	* When the message is sent by a scroll bar control, it correctly
+	* contains the handle to the scroll bar.  The fix is to check for
+	* both.
+	*/
+	if ((lParam == 0 || lParam == handle) && verticalBar != null) {
+		return wmScroll (verticalBar, OS.WM_VSCROLL, wParam, lParam);
+	}
+	return result;
+}
+
+LRESULT wmScroll (ScrollBar bar, int msg, int wParam, int lParam) {
+	LRESULT result = null;
+	if ((state & CANVAS) != 0) {
+		int type = msg == OS.WM_HSCROLL ? OS.SB_HORZ : OS.SB_VERT;
+		SCROLLINFO info = new SCROLLINFO ();
+		info.cbSize = SCROLLINFO.sizeof;
+		info.fMask = OS.SIF_TRACKPOS | OS.SIF_POS | OS.SIF_RANGE;
+		OS.GetScrollInfo (handle, type, info);
+		info.fMask = OS.SIF_POS;
+		int code = wParam & 0xFFFF;
+		switch (code) {
+			case OS.SB_ENDSCROLL:  return null;
+			case OS.SB_THUMBTRACK:
+			case OS.SB_THUMBPOSITION:
+				/* 
+				* Note: On WinCE, the value in SB_THUMBPOSITION is relative to nMin.
+				* Same for SB_THUMBPOSITION 'except' for the very first thumb track
+				* message which has the actual value of nMin. This is a problem when
+				* nMin is not zero.
+				*/
+				info.nPos = info.nTrackPos;
+				break;
+			case OS.SB_TOP:
+				info.nPos = info.nMin;
+				break;
+			case OS.SB_BOTTOM:
+				info.nPos = info.nMax;
+				break;
+			case OS.SB_LINEDOWN:
+				info.nPos += bar.getIncrement ();
+				break;
+			case OS.SB_LINEUP:
+				int increment = bar.getIncrement ();
+				info.nPos = Math.max (info.nMin, info.nPos - increment);
+				break;
+			case OS.SB_PAGEDOWN:
+				info.nPos += bar.getPageIncrement ();
+				break;
+			case OS.SB_PAGEUP:
+				int pageIncrement = bar.getPageIncrement ();
+				info.nPos = Math.max (info.nMin, info.nPos - pageIncrement);
+				break;
+		}
+		OS.SetScrollInfo (handle, type, info, true);
+	} else {
+		int code = callWindowProc (msg, wParam, lParam);
+		result = code == 0 ? LRESULT.ZERO : new LRESULT (code);
+	}
+	bar.wmScrollChild (wParam, lParam);
+	return result;
+}
+
+}