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_Application.FeatureInstall property

Returns or sets a value (constant) that specifies how Microsoft Excel handles calls to methods and properties that require features that aren’t yet installed. Read/write MsoFeatureInstall.

Namespace:  Microsoft.Office.Interop.Excel
Assembly:  Microsoft.Office.Interop.Excel (in Microsoft.Office.Interop.Excel.dll)

MsoFeatureInstall FeatureInstall { get; set; }

MsoFeatureInstall can be one of these MsoFeatureInstall constants:

  • msoFeatureInstallNone  Generates a generic Automation error at run time when uninstalled features are called. This is the default constant.

  • msoFeatureInstallOnDemand  Prompts the user to install new features.

  • msoFeatureInstallOnDemandWithUI  Displays a progress meter during installation; doesn’t prompt the user to install new features.

You can use the msoFeatureInstallOnDemandWithUI constant to prevent users from thinking that the application isn't responding while a feature is being installed. Use the msoFeatureInstallNone constant if you want the developer to be the only one who can install features.

If you have the DisplayAlerts property set to False, users won’t be prompted to install new features even if the FeatureInstall property is set to msoFeatureInstallOnDemand. If the DisplayAlerts property is set to True, an installation progress meter will appear if the FeatureInstall property is set to msoFeatureInstallOnDemand.

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