Audience

Visual Basic 6.0 developers and web applications developers

Prerequisites

The courses Microsoft Visual Basic 6.0 Desktop: Introduction to COM Components, Microsoft Visual Basic 6.0 Desktop: Creating COM Components 1, and Microsoft Visual Basic 6.0 Desktop: Creating COM Components 2; a good knowledge of Visual Basic programming

Course Aim

To show how to design components, provide polymorphism and asynchronous processing, and test and debug components

Learning Objectives

Explain the role of interfaces in COM components. Provide polymorphism. Provide for version updates to COM components. Provide for asynchronous processing using callback mechanisms. List the design considerations for components. Test and debug COM components. Generate errors within COM components.

Topics Covered

Interfaces and object models - Creating object models - Providing polymorphism with interfaces - Creating callback procedures Testing and error handling - Implementing project groups - Testing out-of-process components - Generating and handling errors Component design considerations - Application models - Design techniques Hands-on: Testing and debugging - Live application tutorial - In-process debugging - Out-of-process debugging

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