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OpenStateChange Event of the AxWindowsMediaPlayer Object

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[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The OpenStateChange event occurs when the openState property changes value.

[C#]
private void player_OpenStateChange(
  object sender,
  _WMPOCXEvents_OpenStateChangeEvent e
)

[Visual Basic]
Private Sub player_OpenStateChange(
  sender As Object,
  e As _WMPOCXEvents_OpenStateChangeEvent
) Handles player.OpenStateChange

Event Data

The handler associated with this event is of type AxWMPLib._WMPOCXEvents_OpenStateChangeEventHandler. This handler receives an argument of type AxWMPLib._WMPOCXEvents_OpenStateChangeEvent, which contains the following property related to this event.

Property Description
NewState System.Int32Specifies the new open state. For a table of values, see openState.

Remarks

Windows Media Player can go through several open states while it attempts to open a network file, such as locating the server, connecting to the server, and finally opening the file. This event will be fired each time the open state changes.

Windows Media Player states are not guaranteed to occur in any particular order. Furthermore, not every state necessarily occurs during a sequence of events. You should not write code that relies upon state order.

Requirements

Requirement Value
Version
 Windows Media Player 9 Series or later
Namespace
 AxWMPLib
Assembly
AxInterop.WMPLib.dll (AxInterop.WMPLib.dll.dll)

See also

AxWindowsMediaPlayer Object (VB and C#)

AxWindowsMediaPlayer.openState (VB and C#)