IUpdateSearcher::BeginSearch method (wuapi.h)

Begins execution of an asynchronous search for updates. The search uses the search options that are currently configured.

Syntax

HRESULT BeginSearch(
  [in]  BSTR       criteria,
  [in]  IUnknown   *onCompleted,
  [in]  VARIANT    state,
  [out] ISearchJob **retval
);

Parameters

[in] criteria

A string that specifies the search criteria.

[in] onCompleted

An ISearchCompletedCallback interface that is called when an asynchronous search operation is complete.

[in] state

The caller-specific state that is returned by the AsyncState property of the ISearchJob interface.

[out] retval

An ISearchJob interface that represents the current operation that might be pending.

The caller passes the returned value to the EndSearch method to complete a search operation.

Return value

Returns S_OK if successful. Otherwise, returns a COM or Windows error code.

This method can also return the following error codes.

Remarks

For a complete description of search criteria syntax, see Search.

As an alternative to implementing the ISearchCompletedCallback interface, you can use a script to implement a callback routine of any identifier with DISPID 0 on an automation object. The type of the onCompleted parameter is IUnknown*.

When you use any asynchronous WUA API in your app, you might need to implement a time-out mechanism. For more info about how to perform asynchronous WUA operations, see Guidelines for Asynchronous WUA Operations.

Requirements

See also

IUpdateSearcher