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MsiQueryFeatureStateW function (msi.h)

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The MsiQueryFeatureState function returns the installed state for a product feature.

Syntax

INSTALLSTATE MsiQueryFeatureStateW(
  [in] LPCWSTR szProduct,
  [in] LPCWSTR szFeature
);

Parameters

[in] szProduct

Specifies the product code for the product that contains the feature of interest.

[in] szFeature

Identifies the feature of interest.

Return value

Value Meaning
INSTALLSTATE_ABSENT
 The feature is not installed.
INSTALLSTATE_ADVERTISED
 The feature is advertised
INSTALLSTATE_LOCAL
 The feature is installed locally.
INSTALLSTATE_SOURCE
 The feature is installed to run from source.
INSTALLSTATE_INVALIDARG
 An invalid parameter was passed to the function.
INSTALLSTATE_UNKNOWN
 The product code or feature ID is unknown.
 
 

Remarks

The MsiQueryFeatureState function does not validate that the feature is actually accessible.

Note

The msi.h header defines MsiQueryFeatureState as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement Value
Minimum supported client Windows Installer 5.0 on Windows Server 2012, Windows 8, Windows Server 2008 R2 or Windows 7. Windows Installer 4.0 or Windows Installer 4.5 on Windows Server 2008 or Windows Vista. Windows Installer on Windows Server 2003 or Windows XP. See the Windows Installer Run-Time Requirements for information about the minimum Windows service pack that is required by a Windows Installer version.
Target Platform Windows
Header msi.h
Library Msi.lib
DLL Msi.dll

See also

System Status Functions