<formRegion> element (Office development in Visual Studio)
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
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The formRegion element of the vstov4 namespace identifies a Microsoft Office Outlook form region that is associated with a VSTO Add-in.
Syntax
<formRegion
name>
<messageClass
name/>
</formRegion>
Elements and attributes
The formRegion element of the vstov4 namespace identifies a form region that is associated with an Outlook VSTO Add-in. It is required only for Outlook VSTO Add-ins that include form regions.
There can be multiple formRegion elements defined inside a formRegions element for a single VSTO Add-in.
The formRegion element has the following attribute.
| Attribute | Description |
|---|---|
name |
Required. Identifies the form region name. |
The formRegion element has the following child elements.
messageClass
The messageClass element identifies the Outlook form that is associated with the form region.
The messageClass element has the following attribute.
| Attribute | Description |
|---|---|
name |
Required. Identifies the form that is associated with the form region. |
Example
The following code example illustrates a formRegion element in an application manifest for an Outlook VSTO Add-in deployed using ClickOnce. There are three message classes associated with this one form region. This code example is part of a larger example provided in Application manifests for Office solutions.
<vstov4:formRegion
name="OutlookAddIn1.FormRegion1">
<vstov4:messageClass name="IPM.Note" />
<vstov4:messageClass name="IPM.Contact" />
<vstov4:messageClass name="IPM.Appointment" />
</vstov4:formRegion>