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CallbackForMidiKeyboardEventsSet method |
  
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CallbackForMidiKeyboardEventsSet method |
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Remarks
Sets a callback for receiving notification of events generated by the virtual piano keyboard.
For further details about callback delegates see the How to synchronize the container application with the API tutorial.
For further details about the use of MIDI protocol see the MIDIMan class section and the How to deal with MIDI protocol tutorial.
Syntax
[Visual Basic] Public Function CallbackForMidiKeyboardEventsSet ( function as CallbackForMidiKeyboardEvents ) as enumErrorCodes |
[C#] public enumErrorCodes CallbackForMidiKeyboardEventsSet ( CallbackForMidiKeyboardEvents function ); |
[C++] public: enumErrorCodes CallbackForMidiKeyboardEventsSet ( CallbackForMidiKeyboardEvents function ); |
Parameter |
Description |
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function |
Callback function that will receive events generated by the virtual piano keyboard. Remember that callback functions must be as fast as possible in order to avoid slowing down overall performances. |
when using the API from Unmanaged C++ through COM interaction, where the client application is totally unaware about .NET delegates, you should use the "Ptr" version of the method which allows passing the pointer to the callback function:
[Unmanaged C++] enumErrorCodes CallbackForMidiKeyboardEventsSetPtr ( (UINT_PTR) functionPointer ); |
Parameter |
Description |
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functionPointer |
Pointer to the callback function. See the Adding the API to an unmanaged Visual C++ project tutorial for details about usage of the "Ptr" version of these methods. |
Return value
Value |
Meaning |
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Negative value |
An error occurred (see the LastError property for further error details) |
enumErrorCodes.NOERROR (0) |
The method call was successful. |
