The MsiProvideComponent function returns the full component path, performing any necessary installation. This function prompts for source if necessary and increments the usage count for the feature.

Syntax

C++UINT MsiProvideComponent(
  __in     LPCTSTR szProduct,
  __in     LPCTSTR szFeature,
  __in     LPCTSTR szComponent,
  __in     DWORD dwInstallMode,
  __out    LPTSTR lpPathBuf,
  __inout  DWORD *pcchPathBuf
);

Parameters

szProduct [in]

Specifies the product code for the product that contains the feature with the necessary component.

szFeature [in]

Specifies the feature ID of the feature with the necessary component.

szComponent [in]

Specifies the component code of the necessary component.

dwInstallMode [in]

Defines the installation mode. This parameter can be one of the following values.

Value	Meaning
INSTALLMODE_DEFAULT	Provide the component and perform any installation necessary to provide the component. If the key file of a component in the requested feature, or a feature parent, is missing, reinstall the feature using MsiReinstallFeature with the following flag bits set: REINSTALLMODE_FILEMISSING, REINSTALLMODE_FILEOLDERVERSION, REINSTALLMODE_FILEVERIFY, REINSTALLMODE_MACHINEDATA, REINSTALLMODE_USERDATA and REINSTALLMODE_SHORTCUT.
INSTALLMODE_EXISTING	Provide the component only if the feature exists. Otherwise return ERROR_FILE_NOT_FOUND. This mode verifies that the key file of the component exists.
INSTALLMODE_NODETECTION	Provide the component only if the feature exists. Otherwise return ERROR_FILE_NOT_FOUND. This mode only checks that the component is registered and does not verify that the key file of the component exists.
combination of the REINSTALLMODE flags	Call MsiReinstallFeature to reinstall feature using this parameter for the dwReinstallMode parameter, and then provide the component.
INSTALLMODE_NOSOURCERESOLUTION	Provide the component only if the feature's installation state is INSTALLSTATE_LOCAL. If the feature's installation state is INSTALLSTATE_SOURCE, return ERROR_INSTALL_SOURCE_ABSENT. Otherwise return ERROR_FILE_NOT_FOUND. This mode only checks that the component is registered and does not verify that the key file exists.

 

lpPathBuf [out]

Pointer to a variable that receives the path to the component. This parameter can be null.

pcchPathBuf [in, out]

Pointer to a variable that specifies the size, in characters, of the buffer pointed to by the lpPathBuf parameter. On input, this is the full size of the buffer, including a space for a terminating null character. If the buffer passed in is too small, the count returned does not include the terminating null character.

If lpPathBuf is null, pcchBuf can be null.

Return Value

For more information, see Displayed Error Messages.

Remarks

Upon success of the MsiProvideComponent function, the pcchPathBuf parameter contains the length of the string in lpPathBuf.

The MsiProvideComponent function combines the functionality of MsiUseFeature, MsiConfigureFeature, and MsiGetComponentPath. You can use the MsiProvideComponent function to simplify the calling sequence. However, because this function increments the usage count, use it with caution to prevent inaccurate usage counts. The MsiProvideComponent function also provides less flexibility than the series of individual calls.

If the application is recovering from an unexpected situation, the application has probably already called MsiUseFeature and incremented the usage count. In this case, the application should call MsiConfigureFeature instead of MsiProvideComponent to avoid incrementing the count again.

The INSTALLMODE_EXISTING option cannot be used in combination with the REINSTALLMODE flag.

Features with components containing a corrupted file or the wrong version of a file must be explicitly reinstalled by the user or by having the application call MsiReinstallFeature.

Requirements

See Also

Component-Specific Functions

Multiple-Package Installations

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Build date: 8/13/2009