Visual C++ 6 Unleashed

By MICKEY WILLIAMS and David Bennett

• Table of Contents
  • Copyright
  • About the Authors
  • About the Contributors
  • Acknowledgments
  • Tell Us What You Think!
  • Introduction
  • How to Use This Book
  • What You Need to Use This Book
  • What's New in Visual C++ 6.0
  • Contacting the Main Author
  • Part I: Introduction
  • Chapter 1. The Visual C++ 6.0 Environment
  • Part II: MFC Programming
  • Chapter 2. MFC Class Library Overview
  • Chapter 3. MFC Message Handling Mechanism
  • Chapter 4. The Document View Architecture
  • Chapter 5. Creating and Using Dialog Boxes
  • Chapter 6. Working with Device Contexts and GDI Objects
  • Chapter 7. Creating and Using Property Sheets
  • Chapter 8. Working with the File System
  • Chapter 9. Using Serialization with File and Archive Objects
  • Part III: Internet Programming with MFC
  • Chapter 10. MFC and the Internet Server API (ISAPI)
  • Chapter 11. The WinInet API
    • Using the WinInet C API
    • General Internet Functions
    • FTP Client Functions
    • HTTP Client Functions
    • Gopher Client Functions
    • MFC WinInet Classes
    • Summary
  • Chapter 12. MFC HTML Support
  • Part IV: Advanced Programming Topics
  • Chapter 13. Using the Standard C++ Library
  • Chapter 14. Error Detection and Exception Handling Techniques
  • Chapter 15. Debugging and Profiling Strategies
  • Chapter 16. Multithreading
  • Chapter 17. Using Scripting and Other Tools to Automate the Visual C++ IDE
  • Part V: Database Programming
  • Chapter 18. Creating Custom AppWizards
  • Chapter 19. Database Overview
  • Chapter 20. ODBC Programming
  • Chapter 21. MFC Database Classes
  • Chapter 22. Using OLE DB
  • Chapter 23. Programming with ADO
  • Part VI: MFC Support for COM and ActiveX
  • Chapter 24. Overview of COM and Active Technologies
  • Chapter 25. Active Documents
  • Chapter 26. Active Containers
  • Chapter 27. Active Servers
  • Chapter 28. ActiveX Controls
  • Part VII: Using the Active Template Library
  • Chapter 29. ATL Architecture
  • Chapter 30. Creating COM Objects Using ATL
  • Chapter 31. Creating ActiveX Controls Using ATL
  • Chapter 32. Using ATL to Create MTS and COM+ Components
  • Part VIII: Finishing Touches
  • Chapter 33. Adding Windows Help
  • Part IX: Appendix

Gopher Client Functions

The WinInet API also provides functions that your client applications can use to retrieve information from Gopher servers. The Gopher protocol was developed at the University of Minnesota to provide an ASCII-based system for browsing a series of menus to locate various resources on a network.

The WinInet Gopher functions require the use of a Gopher connection handle that was created with a call to InternetConnect().

To access objects on a Gopher server, a special ASCII string known as a Gopher locator is used. This string is similar to the URL strings used in HTTP requests. You can create a locator string with a call to GopherCreateLocator(). You also can retrieve specific information about a locator string with the GopherGetLocatorType() function.

To find Gopher resources on a server, you can start a query with GopherFindFirstFile() and retrieve individual entries with the InternetFindNext() function, as you saw earlier for FTP connections.

You can request information from the server about a Gopher object with a call to GopherGetAttributes(). To retrieve a file from the server, you can use GopherOpenFile() to open a file handle, which then can be used in calls to InternetReadFile().

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