Auto-Hold CTRL System Implementation Guide

This guide explains how to add an auto-hold CTRL feature to your game client. When you double-press CTRL, it will automatically hold the CTRL key until you double-press it again to release.

Overview

The auto-hold CTRL system allows players to:
• Double-press CTRL to automatically hold it down
• Double-press CTRL again to release it
• See chat notifications when the feature is toggled
• No UI option needed - works automatically

Files Modified

1. _define.h

Add the auto-hold CTRL bit flag:



2. NewUICommon.h

Add member variables to CNewKeyInput struct:



Add method declarations:



Add global function declarations:



3. NewUICommon.cpp

Initialize variables in CNewKeyInput::Init():



Add call to UpdateDoubleCtrlDetection() in ScanAsyncKeyState():



Implement the double CTRL detection logic:



Implement the helper methods:



Modify IsRepeat() to handle auto-hold CTRL:



Add global function implementations:



How It Works

Double-Press Detection
1. First CTRL Press: Records the time and sets press count to 1
2. Second CTRL Press: If within 500ms, detects as double-press and toggles auto-hold
3. Timeout: If more than 1 second passes without CTRL press, resets the counter

Auto-Hold Simulation
1. IsRepeat() Modification: When CTRL is auto-held, `IsRepeat(VK_CONTROL)` returns `true`
2. Game Integration: The game treats auto-held CTRL as if the key is physically held down
3. Toggle System: Double-press again to release the auto-hold

Chat Notifications
1. System Messages: Uses `TYPE_SYSTEM_MESSAGE` for chat notifications
2. Toggle Feedback: Shows "Auto-Hold CTRL: ON" or "Auto-Hold CTRL: OFF"


Key Features

• No UI Option Required: Works automatically without needing to enable in settings
• Double-Press Detection: 500ms window for double-press detection
• Chat Notifications: Clear feedback when toggling the feature
• Timeout Protection: 1-second timeout prevents accidental activation
• Seamless Integration: Works with existing game input system

Usage

1. Activate: Double-press CTRL quickly (within 500ms)
2. Deactivate: Double-press CTRL again to release
3. Feedback: Chat will show "Auto-Hold CTRL: ON/OFF" messages
4. Behavior: CTRL will remain held until you double-press again

Technical Details

• Time Window: 500ms for double-press detection
• Timeout: 1 second for resetting press counter
• Chat Type: `TYPE_SYSTEM_MESSAGE` for notifications
• Key State: Modifies `IsRepeat()` to simulate held key
• Memory: Uses `DWORD` for timestamps and press counting

Troubleshooting

Common Issues:
1. Not Working: Ensure `UpdateDoubleCtrlDetection()` is called in `ScanAsyncKeyState()`
2. No Chat Messages: Check that `g_pChatListBox` is available
3. Timing Issues: Adjust the 500ms window if needed for your game
4. Compilation Errors: Make sure all includes are correct

Testing:
1. Double-press CTRL and check chat for "Auto-Hold CTRL: ON"
2. Try using CTRL functions (like item info) - should work without holding
3. Double-press CTRL again and check chat for "Auto-Hold CTRL: OFF"
4. Verify CTRL functions require physical holding again

This implementation provides a clean, user-friendly auto-hold CTRL system that integrates seamlessly with the existing game architecture.


Credits: ShadowCode

There is other simpler method but this is good practice to help anyone who want to learn.