Topic Path: Symbol Reference > Classes > TIdIOHandler Class > TIdIOHandler Properties > OnWorkBegin Event
Event handler signalled when a read or write request is started.
property OnWorkBegin;
OnWorkBegin is a public TWorkBeginEvent property that represents the event handler signalled when a read or write request is initiated for the IOHandler connection.
Applications must assign a procedure to the event handler that accepts arguments as used in TWorkBeginEvent.
Use OnWorkEnd to respond to completion of an IO request.
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Pascal