How to develop Outlook, Excel, Word
and PowerPoint add-in in VSTO 2005, 2008

Add-in Express™
for Microsoft® Office and VSTO

Version 6.7.4622

ADDED:

FIXED:

"Arithmetic operation resulted in an overflow" exception when an advanced task pane was used in Excel, Word or PowerPoint 2010 x64.
The size of a dock-based advanced Outlook region was not saved if the Splitter property was set to None.
ADXOlForm placed in the DockTop layout increased in size after switching Outlook 2007 command bars to the "Large icons" mode.
An advanced region embedded into the Reading Pane remained invisible after a small Outlook Explorer window was restored to the normal size.
Pressing the Enter key produced a double response in the WebBrowser component placed on ADXOlForm.
Compatibility issues between advanced Outlook regions and some third-party applications in Outlook 2010 32-bit.

KNOWN ISSUES:

WPF + Office 2003 - 2007 Issues:

Various issues remain in all Office and .NET Framework versions caused by a partial incompatibility of the WPF core and Office GUI.

WebBrowser Control Issues:

In Outlook, Excel, Word and PowerPoint, a host application may lose the focus after activating the WebBrowser control placed on an advanced region or advanced task pane.

Outlook 2003-2010 Issues:

WebViewPane region cannot be used for folders if their WebViewOn and WebViewUrl properties cannot be set. Possible solution is setting the "Allow Script in shared folders" and "Allow Script in Public Folders" options in the security settings. See also the following article: http://support.microsoft.com/kb/923933.
ADXOlForm placed in the WebViewPane region is flickering when switching between folders.

Outlook 2010 Issues:

TopSubpane, BottomSubpane, RightSubpane, LeftSubpane and FolderView regions for appointment folders do not work in Outlook 2010. We recommend using the DockTop, DockBottom, DockRight and DockLeft regions as an alternative.
Add-ins containing advanced regions built on Add-in Express 2009 are incompatible with add-ins built on Add-in Express 2010.
An ADXOlForm may lose the focus when switching between pages on Inspector windows.
Another form may become active when switching between Inspector pages if the forms were added to the same region by several add-ins.
BottomTodoBar region works only when Appointments or Task List is enabled in the ToDo bar options.

Social Connector Outlook Add-in Issues:

In Outlook 2003, 2007 and 2010, advanced regions may work incorrectly if the Social Connector Add-in is enabled/disabled manually. Outlook should be restarted for advanced regions to work correctly.
In Outlook 2003, 2007 and 2010, the ReadingPane region does not work if the Social Connector Add-in is installed.

InfoPath 2010 Issues:

Native Office 2010 custom task panes may not show up when a new instance of InfoPath is opened.

Office 2010 x64 Issues:

"Unable to create specified ActiveX control" exception may be thrown on an x64 host application if an add-in had been registered from Visual Studio before a newly created native Office task pane was added to the AddinModule.TaskPanes collection.