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Under Manage, click COM Add ins, and then click Go. To do this, follow these steps:Ĭlick the Microsoft Office Button, and then click Excel Options. The dialog box lists all COM Add-ins that are installed on your system, and the COM Add-ins that are currently loaded are selected.ĬOM Add-ins can also be loaded and unloaded through the Excel user interface. Close the Toolbars dialog box.Ĭlick the COM Add-ins command that you added to display the COM Add-ins dialog box.
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Locate COM Add-ins in the list of commands and drag the command to a menu or CommandBar of your choice. In the Toolbars dialog box, click the Advanced tab. On the View menu, point to Toolbars and then click Customize. The load behavior describes how the Add-in is loaded in Excel: loaded at startup, loaded at next startup only, loaded on demand, or not loaded.ĬOM Add-ins can also be loaded and unloaded through the Excel user interface. The subkey for a COM Add-in also contains values that describe the COM Add-in's friendly name, description, and load behavior. The name of the subkey is the ProgID for the COM Add-in.
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This key contains a subkey for each installed COM Add-in. HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins\ COM Add-ins used by Excel are registered in the following registry key: In addition to normal COM registration, a COM Add-in is registered for each Office application in which it runs. When a COM Add-in is installed on a user's system, registry entries are created for the Add-in. All COM Add-ins must implement each of the five methods of this interface: OnConnection, OnStartupComplete, OnAddinsUpdate, OnBeginShutDown, and OnDisconnection. COM Add-in functions cannot be directly called from cell formulas in worksheets.Ī COM Add-in is an in-process COM server (an ActiveX DLL) that must implement the IDTExensibility2 interface. COM Add-ins are typically used to automate Excel in response to a click of a CommandBar button, a form or dialog box, or some other event specific to Excel such as opening or closing workbooks or entering data on worksheets. More Information COM Add-insĬOM Add-ins present the developer with a way to extend the functionality of Office applications for custom tasks. This article explains the differences between these two types of Add-ins. Microsoft Office Excel support Automation Add-ins in addition to Component Object Model (COM) Add-ins. Excel COM add-ins and Automation add-ins Summary