__UserSettingsFlags Enumeration
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__UserSettingsFlags Enumeration


Used by the integrated development environment (IDE) to define how imported settings are handled.

Namespace:   Microsoft.VisualStudio.Shell.Interop
Assembly:  Microsoft.VisualStudio.Shell.Interop.8.0 (in Microsoft.VisualStudio.Shell.Interop.8.0.dll)

public enum __UserSettingsFlags

Member nameDescription

Specifies that a VSPackage should disable optimizations.


Specifies that a VSPackage is free to either reset settings with valid imported values, or to treat settings import as an additive or merge operation.


Specifies that a VSPackage should overwrite any existing settings with valid imported settings.

The IDE passes registered implementations of ImportSettings flags constructed from __UserSettingsFlags to communicate user preferences during the Import/Export Settings operations.

For example, consider a setting that is a list. The current setting has the members A, B, and C. The settings to be retrieved contain the values D and E. When ImportSettings is called:

  • If the USF_ResetOnImport is used, the implementation of ImportSettings must overwrite the existing settings with D and E.

  • If the USF_None is used, the implementation of ImportSettings is free to

    1. Overwrite the existing settings with D and E.


    1. Merge the imported data with the current data, in this case create a new list containing A, B, C, D, and E.

From vsshell80.idl:

enum __UserSettingsFlags
    USF_None                 = 0x00000000,
    USF_ResetOnImport        = 0x00000001,
    USF_DisableOptimizations = 0x00000002
typedef DWORD UserSettingsFlags;
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