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Runtime Storage Control Overview

Note Required applications

The features in this topic are available only if you have the required applications installed.

For more information, see Features Available by Product Combination.

  • One of these development environments:

    VSTO 2005


    Visual Studio Team System

  • Microsoft Office 2003

The Runtime Storage Control is an ActiveX control embedded in the document or workbook that contains the information needed by the Microsoft Visual Studio 2005 Tools for the Microsoft Office System runtime to run a Microsoft Office 2003 solution.

This information includes:

  • One application manifest.

  • Zero or more cached data sets.

The Runtime Storage Control is not visible in the document.

Application Manifest

The application manifest stores information needed to run the managed code extensions. The application manifest points to a deployment manifest on the server, which contains the most recent location information for the assemblies. For more information, see Application and Deployment Manifests in Office Solutions.

Cached Data

You can cache data in the document by using the CachedAttribute attribute when you declare your data source. Data sources that can be cached are:

Caching reduces the amount of round trips to the server, and makes it possible to interact with the data offline. For more information, see Data in Office Solutions Overview.

Deleting or Copying the Runtime Storage Control

It is possible for end users to delete or copy the Runtime Storage Control. The following examples show how the Visual Studio Tools for Office runtime can detect and correct these circumstances.

End User Performs Select All and Presses Delete

The Runtime Storage Control is deleted. However, the control calls the Visual Studio Tools for Office runtime with information that it is about to be deleted. The runtime adds a new instance of the control to the document, hooks up to the new event sink, and provides persisted information.

End User Performs Select All, Then Copies and Pastes into the Same Document

There are now two Runtime Storage Controls. However, the runtime checks if there are multiple instances of the control. If there are, it deletes the extra instances.

End User Performs Select All, then Copies and Pastes into a Different Document that Has Managed Code Extensions

There are two Runtime Storage Controls claiming to contain the primary stored information for the document. However, a unique identifier (GUID) is created for the control when it is embedded in the document at design time. This GUID is also embedded in the custom document property _AssemblyLocation. Any Runtime Storage Control in the document must also have this GUID. If an extra Runtime Storage Control is found in the document at load time, it is deleted from the document if the GUID does not match the one stored in the document.

End User Performs Select All, then Copies and Pastes into a New Blank Document

There is now a new document with an unused Runtime Storage Control. Without the proper customizations in the document, the control does not do anything. However, it still takes up space in the document.

See Also