The MsiSourceListForceResolutionEx function removes the registration of the property called "LastUsedSource". This function does not affect the registered source list. Whenever the installer requires the source to reinstall a product or patch, it first tries the source registered as "LastUsedSource". If that fails, or if that registration is missing, the installer searches the other registered sources until it finds a valid source or until the list of sources is exhausted. Clearing the "LastUsedSource" registration forces the installer to do a source resolution against the registered sources the next time it requires the source.

Syntax

C++UINT MsiSourceListForceResolutionEx(
  __in      LPCTSTR szProductCodeOrPatchCode,
  __in_opt  LPCTSTR szUserSid,
  __in      MSIINSTALLCONTEXT dwContext,
  __in      DWORD dwOptions
);

Parameters

szProductCodeOrPatchCode [in]

The ProductCode or patch GUID of the product or patch. Use a null-terminated string. If the string is longer than 39 characters, the function fails and returns ERROR_INVALID_PARAMETER. This parameter cannot be NULL.

szUserSid [in, optional]

This parameter can be a string SID that specifies the user account that contains the product or patch. The SID is not validated or resolved. An incorrect SID can return ERROR_UNKNOWN_PRODUCT or ERROR_UNKNOWN_PATCH. When referencing a machine context, szUserSID must be NULL and dwContext must be MSIINSTALLCONTEXT_MACHINE. Using the machine SID ("S-1-5-18") returns ERROR_INVALID PARAMETER. When referencing the current user account, szUserSID can be NULL and dwContext can be MSIINSTALLCONTEXT_USERMANAGED or MSIINSTALLCONTEXT_USERUNMANAGED.

dwContext [in]

This parameter specifies the context of the product or patch instance. This parameter can contain one of the following values.

Type of context	Meaning
MSIINSTALLCONTEXT_USERMANAGED	The product or patch instance exists in the per-user-managed context.
MSIINSTALLCONTEXT_USERUNMANAGED	The product or patch instance exists in the per-user-unmanaged context.
MSIINSTALLCONTEXT_MACHINE	The product or patch instance exists in the per-machine context.

 

dwOptions [in]

The dwOptions value determines the interpretation of the szProductCodeOrPatchCode value .

Flag	Meaning
MSICODE_PRODUCT	szProductCodeOrPatchCode is a product code.
MSICODE_PATCH	szProductCodeOrPatchCode is a patch code.

 

Return Value

The MsiSourceListForceResolutionEx function returns the following values.

Value	Meaning
ERROR_ACCESS_DENIED	The user does not have the ability to modify the specified source list. Does not indicate whether the product or patch was found.
ERROR_BAD_CONFIGURATION	The configuration data is corrupt.
ERROR_INSTALL_SERVICE_FAILURE	Could not access the Windows Installer service
ERROR_INVALID_PARAMETER	An invalid parameter was passed to the function.
ERROR_SUCCESS	The "LastUsedSource" registration was cleared.
ERROR_UNKNOWN_PATCH	The patch was not found.
ERROR_UNKNOWN_PRODUCT	The specified product or patch was not found.
ERROR_FUNCTION_FAILED	Unexpected internal failure.

 

Remarks

Administrators can modify the installation of a product or patch instance that exists under the machine context or under their own per-user context (managed or unmanaged.) They can modify the installation of a product or patch instance that exists under any user's per-user-managed context. Administrators cannot modify another user's installation of a product or patch instance that exists under that other user's per-user-unmanaged context.

Non-administrators cannot modify the installation of a product or patch instance that exists under another user's per-user context (managed or unmanaged.) They can modify the installation of a product or patch instance that exists under their own per-user-unmanaged context. They can modify the installation of a product or patch instance under the machine context or their own per-user-managed context only if they are enabled to browse for a product or patch source. Users can be enabled to browse for sources by setting policy, for more information, see DisableBrowse, AllowLockdownBrowse, and AlwaysInstallElevated policies.

Windows Installer 2.0:  Not supported. The MsiSourceListForceResolutionEx function is available beginning with Windows Installer 3.0.

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 3.0 or later 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	MsiSourceListForceResolutionExW (Unicode) and MsiSourceListForceResolutionExA (ANSI)

See Also

ProductCode

Source Resiliency

Send comments about this topic to Microsoft

Build date: 8/13/2009