AddInBase.RequestService(Guid) Method

Definition

Returns an object that extends a feature in a Microsoft Office application.

protected:
 virtual System::Object ^ RequestService(Guid serviceGuid);
protected virtual object RequestService (Guid serviceGuid);
abstract member RequestService : Guid -> obj
override this.RequestService : Guid -> obj
Protected Overridable Function RequestService (serviceGuid As Guid) As Object

Parameters

serviceGuid
Guid

A Guid that identifies an extensibility interface that is supported by Microsoft Office applications.

Returns

An object that implements the extensibility interface that is identified by serviceGuid.

Examples

For a code example that demonstrates how to implement an extensibility interface and override the RequestService method, see Customizing UI Features By Using Extensibility Interfaces.

Remarks

Override this method in an application-level add-in to implement an extensibility interface that extends a feature in a Microsoft Office application. For more information, see Customizing UI Features By Using Extensibility Interfaces.

When you override this method, check the value of the serviceGuid parameter to determine which extensibility interface is being requested, and then return an object that implements the interface. When your add-in is loaded, the Visual Studio Tools for Office runtime calls RequestService one or more times for each interface that is supported by the application, and it sends the return value to the Microsoft Office application that is loading your add-in. For more information about the load process of add-ins, see Architecture of VSTO Add-ins.

Note

If you are customizing the Ribbon UI by creating your own implementation of the Microsoft.Office.Core.IRibbonExtensibility interface or by adding a Ribbon (XML) item to your project, you can alternatively override the CreateRibbonExtensibilityObject method instead of the RequestService method. For more information, see Ribbon Overview and Ribbon XML.

Applies to