FrymasterVB/Cmdproc-5.frm.md

Command Processor Form (Cmdproc-5.frm)

Overview

The Command Processor form handles command input and execution within the application. It provides a user interface for entering and processing commands.

Key Components

Form Controls

• Command textbox: Accepts command input from user
• Results listbox: Displays command execution results
• Status bar: Shows current command processing status

Main Functions

ProcessCommand()

Processes the entered command string:

• Parses command and arguments
• Validates command syntax
• Executes corresponding command handler
• Returns results to UI

ValidateCommand()

Validates command syntax and parameters:

• Checks command exists
• Verifies required parameters
• Validates parameter types/formats
• Returns validation status

ExecuteCommand()

Executes the validated command:

• Calls appropriate command handler
• Manages execution context
• Handles errors/exceptions
• Returns execution results

Command Types

• System commands (exit, help, etc.)
• File operations (open, save, close)
• Data manipulation commands
• Custom application commands

Events

Form_Load

• Initializes command processor
• Sets up command handlers
• Loads command history

Form_Unload

• Saves command history
• Cleans up resources
• Closes command connections

Error Handling

• Invalid command errors
• Parameter validation errors
• Execution errors
• System errors

Dependencies

• Command handler classes
• Parameter validation library
• Results formatting utilities
• Command history manager

Usage

1. Enter command in command textbox
2. Press Enter or click Execute
3. View results in results listbox
4. Check status bar for execution status

Notes

• Commands are case-insensitive
• Parameters must be space-delimited
• Use /help for command documentation
• Command history accessible via up/down arrows

Version Differences

Cmdproc-1.frm

• Basic command processing only
• Limited to system commands
• No command history
• Simple error handling
• No parameter validation

Cmdproc-2.frm

• Added file operations
• Basic command history
• Improved error messages
• Simple parameter validation
• Status bar feedback

Cmdproc-3.frm

• Added data manipulation commands
• Enhanced command history
• Parameter type checking
• Results formatting
• Command help system

Cmdproc-4.frm

• Custom command support
• Full command history
• Advanced parameter validation
• Rich results display
• Context-sensitive help

Cmdproc-5.frm (Current)

• Complete command framework
• Persistent command history
• Comprehensive validation
• Formatted results output
• Full documentation
• Event-driven architecture
• Modular command handlers
• Enhanced error recovery