This documentation is archived and is not being maintained.

How to: Create and Modify Custom Document Properties

Applies to

The information in this topic applies only to the specified Visual Studio Tools for Office projects and versions of Microsoft Office.

Project type

  • Application-level projects

  • Document-level projects

Microsoft Office version

  • Excel 2007 and Excel 2003

  • PowerPoint 2007 and PowerPoint 2003

  • Project 2007 and Project 2003

  • Word 2007 and Word 2003

For more information, see Features Available by Application and Project Type.

The Microsoft Office applications listed above provide built-in properties that are stored with documents. In addition, you can create and modify custom document properties if there is additional information you want to store with the document.

Use the CustomDocumentProperties property of a document to work with custom properties. For example, in a document-level project for Microsoft Office Excel, use the CustomDocumentProperties property of the ThisWorkbook class. In an application-level project for Excel, use the CustomDocumentProperties property of a Workbook object. These properties return a DocumentProperties object, which is a collection of DocumentProperty objects. You can use the Item property of the collection to retrieve a particular property, either by name or by index within the collection.

The following example demonstrates how to add a custom property in a document-level customization for Excel and assign it a value.

link to video For a related video demonstration, see How Do I: Access and Manipulate Custom Document Properties in Microsoft Word?.

void TestProperties()
    Microsoft.Office.Core.DocumentProperties properties;
    properties = (Office.DocumentProperties)this.CustomDocumentProperties;

    if (ReadDocumentProperty("Project Name") != null)
        properties["Project Name"].Delete();

    properties.Add("Project Name", false,
        "White Papers", missing);

private string ReadDocumentProperty(string propertyName)
    Office.DocumentProperties properties;
    properties = (Office.DocumentProperties)this.CustomDocumentProperties;

    foreach (Office.DocumentProperty prop in properties)
        if (prop.Name == propertyName)
            return prop.Value.ToString();
    return null;

Attempting to access the Value property for undefined properties raises an exception.