Microsoft Sharepoint Products and Technologies Resource Kit eBook

1058 Part X: Microsoft Office 2003 Integration with SharePoint Products and Technologies
Note The relink feature will not work for forms that were created with a different
form template than that of the form library.
F39XR14
Figure 39-14 Relink Forms page
Deploying Fully Trusted Forms
By default, InfoPath forms published to SharePoint form libraries are restricted from
accessing system resources and are not allowed to use any software components
that are not marked as safe for scripting. Such forms (and their templates) are said
to be sandboxed. A sandboxed form template is cached for offline use, is automatically
updated, and has restricted access to system resources. When a user fills a
sandboxed form out, the form is placed in a local cache and denied access to system
resources. Up until now in this chapter, we have been discussing the sandboxed
forms. This type of form is sometimes referred to as standard forms; they inherit
their permissions from the domain in which it is opened.
You can avoid these limitations by creating a fully trusted form. Fully trusted
forms have more permissions than sandboxed forms do. For example, they can contain
code that uses external objects for accessing system resources; they can use software
components or Microsoft ActiveX controls that are not marked as safe for
scripting; and they can use custom business logic provided by COM components. In
addition, some members of the InfoPath object model are set to security level 3,
which means that they can only be used in a fully trusted form. For example, to
access the Microsoft Office CommandBars object, you use the CommandBars property
of the InfoPath object to set a reference to it. Because this property is set to
security level 3, it cannot be used in a form that is not fully trusted.
Unlike sandboxed forms, fully trusted forms must be installed on the client
computer. That is why they are sometimes referred to as custom installed forms.
Deploying a fully trusted form involves deploying form files in two locations.