http Busy property
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Applies to
WinHTTP component.  

Declaration
property Busy: Boolean; // Read-only !!  

Description
The Busy property determines whether the HTTP component (its thread) are busy when its execute some operations. When Busy property is True, the WinHTTP currently requesting/downloading data from the Web, or processing OnDone event handler.  

Note
iiwarning You can NOT download any data when the HTTP is busy, and must wait until component done all operations. The Read method will return False when the component is busy.  

See also
Read method; OnDone and OnAnyError events.