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I think you would have to have programmed in some remoting capabilities into the add-in for it to be callable from external applications. &nbsp; Not sure on this, but that would probably be the best bet.
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I think you would have to have programmed in some remoting capabilities into the add-in for it to be callable from external applications.   Not sure on this, but that would probably be the best bet.

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remoting capabilities??? How and where should me start with???
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remoting capabilities??? How and where should me start with???

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have a look at this: <a href="http://msdn.microsoft.com/en-us/library/5dwytyss(VS.71).aspx" rel="ugc">http://msdn.microsoft.com/en-us/library/5dwytyss(VS.71).aspx</a>
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have a look at this: http://msdn.microsoft.com/en-us/library/5dwytyss(VS.71).aspx [http://msdn.microsoft.com/en-us/library/5dwytyss(VS.71).aspx]

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This seem like remote access to another cpu, my case here is both my external app and the addin is in the same cpu, how does this apply to my case??? could you briefly explain to mi? thanks. 
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This seem like remote access to another cpu, my case here is both my external app and the addin is in the same cpu, how does this apply to my case??? could you briefly explain to mi? thanks.

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I had a VSTO word addin and a external application written in VB.NET, I want to call the VSTO addin from my VB.NET application to carry out some operation in word. Just like calling a VB Marcos from another external application. Is it possible???
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I had a VSTO word addin and a external application written in VB.NET, I want to call the VSTO addin from my VB.NET application to carry out some operation in word. Just like calling a VB Marcos from another external application. Is it possible???

Call VSTO addin from external program

Most development for the Microsoft platform is done utilizing the technologies supported by the.NET framework. Other development is done using Visual Basic for Applications (VBA) for programs like Access, Excel, Word and Outlook, with PowerShell for scripting, or with SQL for large databases.

Microsoft Development

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.

.NET Programming

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,