Implements .FormRegionStartup.GetFormRegionStorage _ ByVal FormRegionMode As Outlook.OlFormRegionMode,īyVal FormRegionSize As Outlook.OlFormRegionSize) _ In Visual Basic: Public Function GetFormRegionStorage(ByVal FormRegionName As String, The method prototype for GetFormRegionStorage in Microsoft Visual Basic and Microsoft C# are shown below. Outlook will also instantiate a FormRegion object for the form region.

Outlook will use the returned information to instantiate controls and calculate the layout for the form region. This information can be a local path to the layout file (.OFS file), a Microsoft Windows IStorage object, or a byte array with the contents of the OFS file, which allows an add-in to store the OFS as a resource. When the add-in receives a call from Outlook to GetFormRegionStorage specifying information for a form region, the add-in will return information for the layout. When Outlook is about to display a form region that is controlled by an add-in, Outlook will call the GetFormRegionStorage method. Outlook will call the four methods in this interface: In the same class that implements the IDTExtensibility2 interface of your COM Add-in, implement the Outlook.FormRegionStartup interface, which is defined in the Outlook type library. For more information on registering a form region in the Windows registry, see Specifying Form Regions in the Windows Registry. When you register the form region for a message class, create a key in the Windows registry for that message class (if the key does not yet exist), and specify as data, an equal sign ( =) followed by the ProgID of the add-in. This topic describes how to implement FormRegionStartup and access Outlook controls in a form region.

Add-ins will be able to use Microsoft Forms 2.0 controls and Microsoft Outlook controls in a form region. Your add-in will implement a new interface, FormRegionStartup.

Unlike customizing form pages in a standard form, you don't use VBScript to write code behind a form instead, you program form regions with a COM add-in.

While you can create and run forms with form regions without a COM add-in, using a COM add-in will allow form regions to include custom business logic or advanced functionality.

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