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IUpdateInstaller::BeginUninstall method (wuapi.h)

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Starts an asynchronous uninstallation of the updates.

Syntax

HRESULT BeginUninstall(
  [in]  IUnknown         *onProgressChanged,
  [in]  IUnknown         *onCompleted,
  [in]  VARIANT          state,
  [out] IInstallationJob **retval
);

Parameters

[in] onProgressChanged

An IInstallationProgressChangedCallback interface that is called periodically for uninstallation progress changes before the uninstallation is complete.

[in] onCompleted

An IInstallationCompletedCallback interface that is called when an installation operation is complete.

[in] state

The caller-specific state that the AsyncState property IInstallationJob interface returns.

[out] retval

An IInstallationJob interface that contains the properties and methods that are available to an asynchronous uninstall operation that was initiated.

Return value

This method returns the following HRESULT values and other COM or Windows

error codes.

Return code Description
S_OK
 The asynchronous removal of an update started successfully.
WU_E_INSTALL_NOT_ALLOWED
 Do not call this method when the installer is installing or removing an update.

Call this method only when the IsBusy property of the IUpdateInstaller interface returns VARIANT_FALSE.
WU_E_NO_UPDATE
 Windows Update Agent (WUA) does not have updates in the collection.

Remarks

If you call this method from a scripting language, set the onProgressChanged parameter to the identifier of an Automation object with a dispatch identifier (DSIPID) of zero (0) that implements the callback routine. Do the same thing for the onCompleted parameter.

This method returns WU_E_NO_UPDATE if the Updates property of IUpdateInstaller is not set. This method also returns WU_E_NO_UPDATE if the Updates property is set to an empty collection.

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

Requirement Value
Minimum supported client Windows XP, Windows 2000 Professional with SP3 [desktop apps only]
Minimum supported server Windows Server 2003, Windows 2000 Server with SP3 [desktop apps only]
Target Platform Windows
Header wuapi.h
Library Wuguid.lib
DLL Wuapi.dll

See also

IUpdateInstaller