MsiEnumFeaturesA function (msi.h)

The MsiEnumFeatures function enumerates the published features for a given product. This function retrieves one feature ID each time it is called.


UINT MsiEnumFeaturesA(
  [in]  LPCSTR szProduct,
  [in]  DWORD  iFeatureIndex,
  [out] LPSTR  lpFeatureBuf,
  [out] LPSTR  lpParentBuf


[in] szProduct

Null-terminated string specifying the product code of the product whose features are to be enumerated.

[in] iFeatureIndex

Specifies the index of the feature to retrieve. This parameter should be zero for the first call to the MsiEnumFeatures function and then incremented for subsequent calls. Because features are not ordered, any new feature has an arbitrary index. This means that the function can return features in any order.

[out] lpFeatureBuf

Pointer to a buffer that receives the feature ID. The size of the buffer must hold a string value of length MAX_FEATURE_CHARS+1. The function returns ERROR_MORE_DATA if the length of the feature ID exceeds MAX_FEATURE_CHARS.

[out] lpParentBuf

Pointer to a buffer that receives the feature ID of the parent of the feature. The size of the buffer must hold a string value of length MAX_FEATURE_CHARS+1. If the length of the feature ID of the parent feature exceeds MAX_FEATURE_CHARS, only the first MAX_FEATURE_CHARS characters get copied into the buffer.

Return value

Value Meaning
The configuration data is corrupt.
An invalid parameter was passed to the function.
A buffer is too small to hold the requested data.
There are no features to return.
A value was enumerated.
The specified product is unknown.


To enumerate features, an application should initially call the MsiEnumFeatures function with the iFeatureIndex parameter set to zero. The application should then increment the iFeatureIndex parameter and call MsiEnumFeatures until there are no more features (that is, until the function returns ERROR_NO_MORE_ITEMS).


The msi.h header defines MsiEnumFeatures as an alias which 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 not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.


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