Sends a request for an update of the area specified by (x, y, w, h). See RFB Doc v. 3.8 section 6.3.4.
[Visual Basic] Public Sub WriteFramebufferUpdateRequest( _ ByVal x As UInt16, _ ByVal y As UInt16, _ ByVal width As UInt16, _ ByVal height As UInt16, _ ByVal incremental As Boolean _ )