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Command Processor Form (Cmdproc-4.frm)

Overview

The Command Processor form provides a user interface for executing and managing commands in the application. It handles command parsing, validation, execution and result display.

Key Components

Command Input

Text input field for entering commands
Command history tracking and navigation
Auto-complete suggestions for commands

Command Processing

Parses raw command text into structured command objects
Validates command syntax and parameters
Routes commands to appropriate handlers
Manages command execution state and cancellation

Results Display

Shows command execution status and progress
Displays command output in formatted view
Handles error messages and exceptions
Supports copy/paste of results

Usage

Basic Command Syntax

[parameters]

Common Commands

help - Display available commands
clear - Clear the results display
exit - Close the command processor
history - Show command history

Parameters

String parameters should be quoted: "example"
Multiple parameters separated by spaces
Optional parameters in square brackets: [param]
Required parameters in angle brackets: <param>

Events

Form Load

Initializes command processor
Loads command history
Sets up event handlers

Form Close

Saves command history
Cleans up resources
Prompts for unsaved changes

Error Handling

Invalid commands show descriptive error messages
Runtime errors are caught and displayed
Long-running commands can be cancelled
System exceptions are logged

Dependencies

Command parser library
Command execution engine
History management
Auto-complete provider

Notes

Commands are case-insensitive
History is persisted between sessions
Maximum 100 history entries stored
Auto-complete uses command history and predefined list

Version Differences

Cmdproc-1.frm

Basic command processing functionality
Simple command parsing
Limited error handling
No command history
No auto-complete

Cmdproc-2.frm

Added command history
Improved error messages
Basic parameter validation
Simple auto-complete
Added clear command

Cmdproc-3.frm

Enhanced parameter parsing
Full command history with persistence
Improved auto-complete suggestions
Added runtime error handling
Support for quoted strings

Cmdproc-4.frm (Current)

Advanced command processing
Full parameter validation
Comprehensive error handling
Command cancellation support
Enhanced auto-complete
History management with 100 entry limit
Case-insensitive commands
System exception logging