IHTMLWindow2::get_onbeforeunload Method

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Retrieves a pointer to the event handler function associated with the onbeforeunload event before a window element is unloaded.

Syntax

HRESULT get_onbeforeunload( 
    VARIANT *p
);

Parameters

p

Address of a VARIANT structure that contains a pointer to the event handler, or NULL otherwise.

Return Value

Returns S_OK if successful, or an error code otherwise.

Remarks

Use the following code fragment to obtain an event handler.

pBody->get_onEvent( &_variant_t(pDisp) ); 
// pDisp a pointer to an IDispatch interface
// pBody a pointer to an element of interest

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IHTMLWindow2::put_onbeforeunload Method

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Sets a pointer to the event handler function associated with the onbeforeunload event before a window element is unloaded.

Syntax

HRESULT put_onbeforeunload(
    VARIANT v 
);

Parameters

v

VARIANT structure that contains a pointer to the event handler to set, or NULL otherwise.

Return Value

Returns S_OK if successful, or an error code otherwise.

Remarks

Use the following code fragment to set an event handler. This method will only add a single event handler. To add multiple event handlers, see the IHTMLDocument3::attachEvent, IHTMLElement2::attachEvent, and IHTMLWindow3::attachEvent methods.

pBody->put_onEvent( &_variant_t(pDisp) ); 
// pDisp a pointer to an IDispatch interface
// pBody a pointer to an element of interest