Callback delegates > CallbackTracksboardPlayHeadPos delegate

Remarks

Callback delegate invoked whenever the position of TracksBoard's play head line is changed: this callback can be set through a call to the CallbackTracksboardPlayHeadPosSet method.

The usage of this delegate is alternative to the TracksBoardPlayHeadPositionChange event.

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

For details about the use of the TracksBoard refer to the How to use the TracksBoard to visually compose songs tutorial.

For further details about methods of the TracksBoard refer to the TracksBoard class section.

Syntax

[Visual Basic]

Public Delegate Sub CallbackTracksboardPlayHeadPos (

bPlayHeadAvailable as Boolean,

nPosInMs as Int32

)

[C#]

public delegate void CallbackTracksboardPlayHeadPos (

bool bPlayHeadAvailable,

Int32 nPosInMs

)

[C++]

public delegate void CallbackTracksboardPlayHeadPos (

bool bPlayHeadAvailable,

Int32 nPosInMs

)

Parameter

Description

bPlayHeadAvailable

Boolean value representing the flag for play head line availability.

Supported values are the following:

Value	Meaning
false	The play head line is hidden. In this case the value passed to the nPosInMs parameter can be ignored.
true	The play head line is visible and its position is passed to the nPosInMs parameter

nPosInMs

The current play head line position, expressed in milliseconds