Top "Add-in" questions

AddIn (Add-In or Add In) is a synonym for plugin - a program that is triggered by a host program allowing third party developers to manipulate or extend the hosting program.

Exception from HRESULT: 0x800A03EC Error

I am getting "HRESULT: 0x800A03EC" error when running Excel add-in with following code: Excel.Range rng = ActiveSheet.Cells[…

c# excel exception interop add-in
How to -> Visual Studio Add In Manager

How do I use the Add-In Manager in Visual Studio? Here is the problem and solution. I want to add …

.net visual-studio installation add-in
COM Add-in for Excel doesn't load when Excel is launched by opening file

Several users have reported that if they launch Excel by double-clicking an Excel file, the add-in will not load. But, …

excel com vb6 add-in
Creating add-in for Excel using C#

I want to use C# class methods in Excel. Can anybody guid me how to do it ? The C# component …

c# excel add-in
Can I make Excel scroll smoothly without using middle-click?

I must work with nightmare Excel files. (I didn't create them, I just have to work with them). They were …

excel vba add-in
Choosing between MEF and MAF (System.AddIn)

The Managed Extensibility Framework (MEF) and Managed AddIn Framework (MAF, aka System.AddIn) seem to accomplish very similar tasks. According …

.net add-in mef system.addin maf
Excel COM add is not loading during startup and have to add it manually

Excel COM addin is not loading during starting up and each time I have to add it manually. After checking …

excel add-in comaddin
What can cause Outlook to change a COM-addin's LoadBehavior to 2 - other than unhandled exceptions?

For some weeks now we have been fighting with an issue where at a small number of customers our Outlook …

exception exception-handling outlook add-in
What ide is good for developing PyQt apps?

What ide is good for developing PyQt apps?

ide pyqt add-in
Disable, but not uninstall Resharper 4.x onwards

Any ideas on how to disable, but not uninstall Resharper 4.x or above?

visual-studio resharper add-in