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MsiQueryFeatureStateEx function

The MsiQueryFeatureStateEx function returns the installed state for a product feature. This function can be used to query any feature of an instance of a product installed under the machine account or any context under the current user account or the per-user-managed context under any user account other than the current user. A user must have administrative privileges to get information for a product installed for a user other than the current user.

Syntax


UINT MsiQueryFeatureStateEx(
  _In_       LPTSTR szProductCode,
  _In_       LPTSTR szUserSid,
  _In_       MSIINSTALLCONTEXT dwContext,
  _In_       LPCTSTR szFeature,
  _Out_opt_  INSTALLSTATE *pdwState
);

Parameters

szProductCode [in]

ProductCode GUID of the product that contains the feature of interest.

szUserSid [in]

Specifies the security identifier (SID) of the account, under which, the instance of the product being queried exists. If dwContext is not MSIINSTALLCONTEXT_MACHINE, a null value specifies the current user.

Type of SIDMeaning
NULL

NULL denotes the currently logged on user.

User SID

Specifies enumeration for a particular user in the system. An example of user SID is "S-1-3-64-2415071341-1358098788-3127455600-2561".

 

Note  The special SID string s-1-5-18 (system) cannot be used to enumerate features of products installed as per-machine. If dwContext is MSIINSTALLCONTEXT_MACHINE, szUserSid must be null.

dwContext [in]

The installation context of the product instance being queried.

NameMeaning
MSIINSTALLCONTEXT_USERMANAGED

Retrieves the feature state for the per-user-managed instance of the product.

MSIINSTALLCONTEXT_USERUNMANAGED

Retrieves the feature state for the per-user-unmanaged instance of the product.

Note  When the query is made on a product installed under the per-user-unmanaged context for a user account other than the current user, the function fails.

MSIINSTALLCONTEXT_MACHINE

Retrieves the feature state for the per-machine instance of the product.

 

szFeature [in]

Specifies the feature being queried. Identifier of the feature as found in the Feature column of the Feature table.

pdwState [out, optional]

Installation state of the feature for the specified product instance. This parameter can return one of the following or null.

ValueMeaning
INSTALLSTATE_ADVERTISED

This feature is advertised.

INSTALLSTATE_LOCAL

The feature is installed locally.

INSTALLSTATE_SOURCE

The feature is installed to run from source.

 

Return value

The MsiQueryFeatureStateEx function returns the following values.

ValueMeaning
ERROR_ACCESS_DENIED

A user must have administrative privileges to get information for a product installed for a user other than the current user.

ERROR_BAD_CONFIGURATION

The configuration data is corrupt.

ERROR_INVALID_PARAMETER

An invalid parameter was passed to the function.

ERROR_SUCCESS

The function completed successfully.

ERROR_UNKNOWN_FEATURE

The feature ID does not identify a known feature.

ERROR_UNKNOWN_PRODUCT

The product code does not identify a known product.

ERROR_FUNCTION_FAILED

An unexpected internal failure.

 

For more information, see Displayed Error Messages.

Remarks

The MsiQueryFeatureStateEx function does not validate that the feature is actually accessible. The MsiQueryFeatureStateEx function does not validate the feature ID. ERROR_UNKNOWN_FEATURE is returned for any unknown feature ID. When the query is made on a product installed under the per-user-unmanaged context for a user account other than the current user, the function fails. In this case the function returns ERROR_UNKNOWN_FEATURE, or if the product is advertised only (not installed), ERROR_UNKNOWN_PRODUCT is returned.

Requirements

Version

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 3.0 or later 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.

Header

Msi.h

Library

Msi.lib

DLL

Msi.dll

Unicode and ANSI names

MsiQueryFeatureStateExW (Unicode) and MsiQueryFeatureStateExA (ANSI)

See also

Displayed Error Messages
Feature Table
ProductCode
System Status Functions
MsiQueryFeatureState
Not Supported in Windows Installer 2.0 and earlier

 

 

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