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

Syntax

C++INSTALLSTATE MsiQueryFeatureState(
  __in  LPCTSTR szProduct,
  __in  LPCTSTR szFeature
);

Parameters

szProduct [in]

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

szFeature [in]

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.

Requirements

Version	Windows Installer 5.0 on 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, Windows XP, and Windows 2000. See the Windows Installer Run-Time Requirements for information about the minimum Windows service pack that is required by a Windows Installer version.
Header	Msi.h
Library	Msi.lib
DLL	Msi.dll
Unicode and ANSI names	MsiQueryFeatureStateW (Unicode) and MsiQueryFeatureStateA (ANSI)

See Also

System Status Functions

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Build date: 8/13/2009