Application Execution

At execution time, the grammars in the SpeechStudio resource script are managed by the SpeechStudio Control. This ActiveX control must be present in any application component that is to be a client of speech recognition. The SpeechStudio help details how to declare a control in source code. One special case is if the application has a dialog or form that is being voice activated, then the SpeechStudio control can be dragged onto the dialog just like any other control. The control will be created automatically when its container is activated.

The SpeechStudio Control method VBStart (Start for VC++) is called whenever a grammar should be activated. In response to this call, the control performs final compilation of the grammar, incorporating any dynamic content, and then communicates the result to SpeechPlayer, which manages the voice recognition engine by loading and unloading grammars and by reacting to recognition information and events. SpeechPlayer and the SpeechStudio control work together to make sure the speech recognition engine is focused on the correct grammars for one application at a time. The application directs the entire operation by calling the control's methods.

When a recognition occurs, SpeechPlayer communicates the recognition information to the SpeechStudio control which will perform the associated actions, as specified in the original pattern. If the action is FireRecognized then the recognized event (or message) is delivered to the application, which performs the desired function. All the possible actions are described in the SpeechStudio control API, part of the SpeechStudio documentation.

Next:  SpeechStudio Control API