Copyright © 2011-2018 MultiMedia Soft

CallbackVuMeterValueChangeSet method

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Remarks

 

Sets the function of the CallbackVuMeterValueChange callback delegate which notifies about VU meter value changes during a playback session.

 

For further details about callback delegates see the How to synchronize the container application with the API tutorial.

For details about using graphic bars refer to the How to perform custom feedbacks rendering using graphic bars section.

 

 

Syntax

 

[Visual Basic]

Public Function CallbackVuMeterValueChangeSet (

function as CallbackVuMeterValueChange

) as enumErrorCodes


 

[C#]

public enumErrorCodes CallbackVuMeterValueChangeSet (

CallbackVuMeterValueChange function

);


 

[C++]

public: enumErrorCodes CallbackVuMeterValueChangeSet (

CallbackVuMeterValueChange function

);


 

 

Parameter

Description

 

 

function

Callback function

 

 

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 CallbackVuMeterValueChangeSetPtr (

(UINT_PTR) functionPointer

);


 

Parameter

Description

 

 

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

 

 

Negative value

An error occurred. Check the LastError property value in order to see the last error.

enumErrorCodes.ERR_NOERROR (0)

The method call was successful.