3.20.4.19 IUpdate::IsInstalled (Opnum 27)

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The IUpdate::IsInstalled (opnum 27) method retrieves whether the update is installed.

 HRESULT IsInstalled(
   [out, retval] VARIANT_BOOL* retval
 );

retval: MUST be set either to VARIANT_TRUE if the update was installed when the search that produced this IUpdate instance was performed or to VARIANT_FALSE if not.

Return Values: The method MUST return information in an HRESULT data structure. The severity bit in the structure identifies the following conditions:

  • If the severity bit is set to 0, the method completed successfully.

  • If the severity bit is set to 1, the method failed and encountered a fatal error.

Exceptions Thrown: No exceptions are thrown beyond those thrown by the underlying RPC protocol [MS-RPCE].

The server SHOULD return the value of the IsInstalled ADM element.