Releasing COM objects: Garbage Collector vs. Marshal.RelseaseComObject

Just recently we've got a comment declaring one of our blogs on releasing COM objects "wrong and misleading": the author says Marshal.ReleasingComObject() and related things made him spend "lots of time on writing code that is totally unnecessary" and provides many links supporting the idea that you can use GC.Collect() to get rid of non-released COM objects.... Read the rest of this entry →

New version of Add-in Express sample COM add-in projects

Quick news: we've developed a new version of sample COM add-in projects that we provide in the downloadable archive on the Add-in Express .NET Downloads page... Read the rest of this entry →

How Add-in Express supports Office 365 / Office 2019

You might already know that Office 365 and Office 2019 are, in fact, subsequent builds of Office 2016: in any Office 365 and Office 2019 application, the Application.Version property returns a string that starts with "16"... Read the rest of this entry →

How to solve synchronization conflict when modifying Outlook item in ItemAdd event

I see this issue in the Sent Items folder on an Exchange account having Cached Exchange Mode turned on. Reportedly, turning the Cached Mode off solves the issue. The Outlook version used (Outlook 365 in my case) seems to be irrelevant as Google reports a similar conflict to occur in Outlook 2007... Read the rest of this entry →

Office from Microsoft Store: a spreading source of issues

The number of users having the Office version installed from Microsoft Store increases every day as computer vendors install it by default; see e.g. this support article from Dell. Per-user add-ins and some per-machine add-ins may run into a severe issue with that Office version. The issue is: the add-in uses old versions... Read the rest of this entry →

Support for Office 2019 is added to Add-in Express for Office and .net

Version 9.2 of Add-in Express for Office and .net is published, and we now announce full support for all versions of Office 2000 through 2019 32-bit and 64-bit... Read the rest of this entry →

Add-in Express for Office and Delphi VCL adds support for Office 2019!

Finally, it happened. Today we have published version 9.1 of Add-in Express for Office and Delphi VCL that fully supports all versions of Office 2000 through 2019. The new versions of Add-in Express for Office and .net is expected soon... Read the rest of this entry →

Version 9 of Security Manager for Microsoft Outlook is released!

Microsoft Office 2019 has been around for a few weeks, and Security Manager is the first of our products to support it. The details follow below... Read the rest of this entry →

Problems with ADXTaskPane are solved in Add-in Express for Office v.9

Recently, our mail boxes became overwhelmed with a flow of reports describing how Add-in Express panes appear outside the host application's window. This is a manifestation of how the code calling the SetParent Windows API function can be incompatible with the recent Windows API change supported by Office 2016: Microsoft introduced DPI contexts and related API functions to let you get/set the current context... Read the rest of this entry →

Add-in Express version 9 adds support for multiple monitors in Office

This story started with Windows 10 Fall Creators Update that allowed using different DPIs on different monitors. How does it affect Office extensions? DPI unaware panes/forms are bitmap-stretched by Windows when DPI changes. To avoid this, you need to get notified about the DPI change and resize the form/pane and controls on it, use a different font size, different images (optional) and the form icon... Read the rest of this entry →

Version 9.0 of Add-in Express for Office is out!

Long-term customers of Add-in Express know that we usually sim-ship new releases with new versions of Microsoft Office. This time is different. While Microsoft guys are probably still working on the new features of Office 2019, the new major version of Add-in Express for Office and .net is live already... Read the rest of this entry →

Range.Replace() problems in all Excel versions

Range.Replace() and supposedly Range.Find() may work incorrectly in a scenario we describe on the Excel for Developers forum. A workaround is: change Range.Value directly... Read the rest of this entry →

Add-in Express for Office issues on multiple monitors with different DPI settings

Microsoft has published Office 2016 build 8828.2010 through its Office Insider update channel. That build supports multiple monitors with different DPI settings; the support relies on the API changes provided by Windows 10 Creators Update.... Read the rest of this entry →

Large Address Aware in Outlook 2016

You might have heard of a recent update of Microsoft Outlook 2016 (LAA) that increased the memory available for Outlook from 2GB to 4GB. We've started receiving questions about how to deal with it. This blog is an answer... Read the rest of this entry →

Excel 2016 crashes if COM add-in creates a command bar control in a built-in context menu

Today's blog is about a recent crash reported by our customer. Our research shows that the crash occurs if your VSTO add-in or COM add-in creates a command bar control on a built-in context menu. We reproduce the crash when customizing the Cells context menu in this way... Read the rest of this entry →

Outlook 2010 – 2016 doesn’t let you set WebViewUrl and WebViewOn

We’ve started a new line of blogs to inform Office and Add-in Express developers about problems and solutions related to Microsoft Office and/or Add-in Express products as early as possible... Read the rest of this entry →

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