Tutorial 2: Using Tools

This tutorial shows how a tool might be implemented as a C++ class and used in a DirectMusic application. The CEchoTool class enables an application to add one or more echoes to every music note in a performance.

The sample code is based on the EchoTool sample application included with the DirectX Programmer's Reference.

The tutorial is broken down into the following steps:

• Step 1: Declaring the Tool Class
• Step 2: Defining the IUnknown Methods
• Step 3: Specifying Message Types
• Step 4: Defining the ProcessPMsg Method
• Step 5: Defining the Class Methods
• Step 6: Adding the Tool to the Performance