Updates the CustomMessageBox control to account for the SystemTray opacity property, similar to how the color property is being handled. This is needed when using the CustomMessageBox control with a page (such as Panorama control) that has a transparent S

0001-Updating-CustomMessageBox-control-to-handle-SystemTr.patch

From ffc6d879979b1290818de3ea7eb5dcf1e1f208bc Mon Sep 17 00:00:00 2001
From: Matt McCormick <[email protected]>
Date: Thu, 1 Nov 2012 09:43:59 -0400
Subject: [PATCH] Updating CustomMessageBox control to handle SystemTray
 opacity properly.

---
 .../CustomMessageBox/CustomMessageBox.cs                 | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/Microsoft.Phone.Controls.Toolkit/CustomMessageBox/CustomMessageBox.cs b/Microsoft.Phone.Controls.Toolkit/CustomMessageBox/CustomMessageBox.cs
index e43f131..505248b 100644
--- a/Microsoft.Phone.Controls.Toolkit/CustomMessageBox/CustomMessageBox.cs
+++ b/Microsoft.Phone.Controls.Toolkit/CustomMessageBox/CustomMessageBox.cs
@@ -139,6 +139,11 @@ namespace Microsoft.Phone.Controls
         private Color _systemTrayColor;
 
         /// <summary>
+        /// The current opacity of the system tray.
+        /// </summary>
+        private double _systemTrayOpacity;
+
+        /// <summary>
         /// Called when the message is being dismissing.
         /// </summary>
         public event EventHandler<DismissingEventArgs> Dismissing;
@@ -500,12 +505,15 @@ namespace Microsoft.Phone.Controls
             _frame = Application.Current.RootVisual as PhoneApplicationFrame;
             _page = _frame.Content as PhoneApplicationPage;
          
-            // Change the color of the system tray if necessary.
+            // Change the color and opacity of the system tray if necessary.
             if (SystemTray.IsVisible)
             {
                 // Cache the original color of the system tray.
                 _systemTrayColor = SystemTray.BackgroundColor;
 
+                // Cache the original opacity of the system tray.
+                _systemTrayOpacity = SystemTray.Opacity;
+
                 // Change the color of the system tray to match the message box.
                 if (Background is SolidColorBrush)
                 {
@@ -515,6 +523,9 @@ namespace Microsoft.Phone.Controls
                 {
                     SystemTray.BackgroundColor = (Color)Application.Current.Resources["PhoneChromeColor"];
                 }
+
+                // Change the opacity of the system tray to match the message box.
+                SystemTray.Opacity = 1.0;
             }
 
             // Hide the application bar if necessary.
@@ -659,10 +670,11 @@ namespace Microsoft.Phone.Controls
             if (restoreOriginalValues)
             {
                 // Set the system tray back to its original 
-                // color if necessary.
+                // color and opacity if necessary.
                 if (SystemTray.IsVisible)
                 {
                     SystemTray.BackgroundColor = _systemTrayColor;
+                    SystemTray.Opacity = _systemTrayOpacity;
                 }
 
                 // Bring the application bar if necessary.
-- 
1.7.11.msysgit.1

This pathc works fine! I am very interested. I'd read some MessageBox Control C# tutorial weeks ago, sounds like the skills on JS MessageBox is quite different from the WinForms MessageBox Control.