| VFPUtils | Contents | Discussion |

• ErrHandler Help Contents
• ErrHandler Tasks: Outstanding, Done, Details
• ErrHandler Messages: By Thread
• ErrHandler References
• Old Notes About the ErrHandler Application
• Welcome to the ErrHandler Forum
  • Download source code and demo application

• Introduction
  • Background
• Demo Programs
  • Sample Error Message Screens
  • How to Start the Demo
  • The Action Code Argument
  • Obtaining Extended Error Information
  • Demo Components
• Usage
  • When to Use ErrHandler
  • Benefits of Using ErrHandler
  • Creating an ErrHandler-Based Application
  • Example of Context-Sensitive Error Reporting
  • Example of Selective Tracing
• Classes and Core Functions
  • Classes
  • Properties
  • Methods
  • Core Functions and Procedures
  • Target Indirection
    • Propagation of Diagnostic and Tracing Output Options
• Appendix - the errhandl.h include file

• VFP Error Handling References
  • FoxTalk
    • Error Handling in Visual FoxPro, 6/96
    • Reusable Tools: Mining for Gold in the FFC
  • Microsoft Knowledge Base
    • Basic Usage
      • Q130526 - How to Use the ON ERROR Command and the Error Event
      • Q136689 - How an ON ERROR Routine Affects the Error Event
      • Q151321 - HOWTO: Implement Generic Error Trapping in FoxPro
      • Q178890 - HOWTO: Use ON ERROR To Debug Applications
    • Bugs and "Problems"
      • Q142287 - PRB: Cannot Trap for Error #1739
      • Q142736 - PRB: RETRY Command in Method Causes Visual FoxPro to Quit
      • Q148999 - BUG: ON ERROR Not Called When Update Conflict Occurs in Grid
      • Q162084 - PRB: Non-Standard RETURN TO MASTER Behavior After LOCATE Error
      • Q179479 - PRB: Problems with Error 2004 and 2005 Commands
      • Q191315 - BUG: ON ERROR Does Not Trap "Alias Not Found" Error
    • Documentation Errors
      • Q136071 - DOC: ON ERROR Not Invoked when Error Occurs in Error Event
      • Q191591 - BUG: Meaningless or Undocumented Errors in Visual FoxPro 6.0
  • Visual FoxPro Help
    • Overview Documentation
      • Debugging and Error Handling
      • Testing and Debugging Applications
        • Handling Run-Time Errors
    • Commands, Functions, and Object-Oriented Interfaces
      • AERROR( ) Function
      • CANCEL Command
      • COMRETURNERROR( ) Function
      • DEBUG Command
      • DEBUGOUT Command
      • ERROR Command
      • Error Event
      • ERROR( ) Function
      • LINENO( ) Function
      • MESSAGE( ) Function
      • ON ERROR Command
      • PROGRAM( ) Function
      • QUIT Command
      • RESUME Command
      • RETRY Command
      • SET DEVELOPMENT Command
      • SET LOGERRORS Command
      • SUSPEND Command
      • SYS(16) - Executing Program File Name
      • SYS(2018) - Error Message Parameter
      • VERSION( ) Function
    • Error Messages
      • Error Messages A-Z
      • Error Messages by Number
      • Error Message Parameters
    • FoxPro Foundation Classes (FFC)
      • Developing Applications Using the Application Framework
      • Error Object (VFP Foundation Class)
      • Guidelines for Using Visual FoxPro Foundation Classes
    • SP3 Changes
      • Automation server exception handling in Visual FoxPro 6 SP3
      • General Protection Fault Handling in Visual FoxPro 6 SP3
      • Run-time Errors for Unsupported Commands in Vfp6t.dll (VFP 6 SP3)
  • FoxForumWiki
  • Usenet Newsgroups
  • Universal Thread
  • Notes About Sources
    • Notes About MSDN Links
    • Notes About FoxTalk Articles
    • Notes About MS KB Articles
    • Notes About VFP Help Topics
    • Notes About FoxForumWiki Topics
    • Notes About Usenet Newsgroup Messages
    • Notes About Universal Thread Messages
  • Further Plans for This Page (VFP Error Handling References)

• include window caption info in diagnostic dialog's message text
• fix RETURN TO ... logic for known problem cases
• RETURN TO ... .F. for non-local failure returns
• further help documentation updates
• revise and update article on VFP error handling references
• extensions for COM error handling
• options for dealing with multiple consecutive errors
• more flexible Resume command button implementation
• assimilate old errhandl.txt task list into new HTML task list
• make appropriate use of ASSERT for usage errors

• fix bug when system menus are unavailable under VFP Dev Sys
• delivered all program updates along with xfma0072 to BT on 2/4/01
• don't propagate ehp_interactive along with diagnostic properties
• propagate Aborts and error info up the target indirection hierarchy
• revise specs for default RETURN depth on user Aborts
• optionally display the whole program stack in errhvfms( )
• allow for self-destruction while the diagnostic dialog is active
• use ehp_success instead of return value from errhtarg( )
• pick up default diagnostic/tracing properties via target indirection
• support a flexible default form-level error handler
• introduce a core UDF for foundation Error event methods
• provide a flexible mechanism for automatic error logging
• diagnostic error-handling options
• optional ErrHandler Init argument for target indirection
• changes for support of nested ErrHandlers
• developer-oriented help for ErrHandler facilities
• article summarizing useful VFP error-handling references

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