Microsoft DirectX 9.0 SDK Update (October 2004)

DSoundHelper.StandardEchoGuid Field

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Note: This documentation is preliminary and is subject to change.
How Do I...?

Retrieves the globally unique identifier (GUID) class identifier for the echo effect.

Definition

Visual Basic .NET Public Shared StandardEchoGuid As Guid
C# public static Guid StandardEchoGuid;
Managed C++ public: static Guid StandardEchoGuid;
JScript .NET public static var StandardEchoGuid : Guid

Field Value

System.Guid . Returns the globally unique identifier (GUID) class identifier for the echo effect.

This field is read-only. 

Remarks

This globally unique identifier (GUID) is used by the EffectDescription structure to set the echo effect to a SecondaryBuffer object.

How Do I...?

Add Effects to a SecondaryBuffer Object

This C# example demonstrates how to add effect objects to a SecondaryBuffer object.

              [C#]
              
//Create and setup the sound device. Device dev = new Device(); dev.SetCooperativeLevel(this,CooperativeLevel.Normal); //Create and setup the buffer description. BufferDescription buffer_desc = new BufferDescription(); buffer_desc.ControlEffects = true; //this has to be true to use effects. buffer_desc.GlobalFocus = true; //play sound even if application loses focus. //Create and setup the buffer for playing the sound. SecondaryBuffer buffer = new SecondaryBuffer( @"C:\WINDOWS\Media\ding.wav", buffer_desc, dev); //Create an array of effects descriptions, //set the effect objects to echo and chorus and //set it in the buffer. EffectDescription[] effects = new EffectDescription[2]; effects[0].GuidEffectClass = DSoundHelper.StandardEchoGuid; effects[1].GuidEffectClass = DSoundHelper.StandardChorusGuid; buffer.SetEffects(effects); //Play Buffer. buffer.Play(0,BufferPlayFlags.Default);


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