ForM546.csx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using CreviceApp.WinAPI.Window;

using static CreviceApp.WinAPI.Constants.WindowsMessages;
using static CreviceApp.WinAPI.Constants.VirtualKeys;


class VerticalWheelManager
{
    public readonly int SuppressionDuration;
    public readonly int ForceEmitThreshold;
    public readonly VerticalWheel Up;
    public readonly VerticalWheel Down;
    public VerticalWheelManager(int duration, int threshold)
    {
        this.SuppressionDuration = duration;
        this.ForceEmitThreshold = threshold;
        this.Up = new VerticalWheel(this);
        this.Down = new VerticalWheel(this);
    }

    public class VerticalWheel
    {
        private int count = 0;
        private readonly System.Threading.Timer timer;
        private readonly VerticalWheelManager manager;
        public VerticalWheel(VerticalWheelManager manager)
        {
            this.manager = manager;
            this.timer = new System.Threading.Timer(new System.Threading.TimerCallback( delegate { Reset(); } ));
        }
        private VerticalWheel GetCounterpart()
        {
            return manager.Up == this ? manager.Down : manager.Up;
        }
        public bool Check()
        {
            GetCounterpart().Reset();
            count += 1;
            if (count == (manager.ForceEmitThreshold < 2 ? 1 : 2))
            {
                timer.Change(manager.SuppressionDuration, System.Threading.Timeout.Infinite);
                return true;
            }
            if (count > manager.ForceEmitThreshold)
            {
                Reset();
                return Check();
            }
            else
            {
                return false;
            }
        }
        public void Reset()
        {
            count = 0;
            timer.Change(System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite);
        }
    }
}


/*
 * Gesture definitions for standard browsers. 
 */
var Browser = @when((ctx) =>
{
    return ctx.ForegroundWindow.ModuleName == "chrome.exe" ||
           ctx.ForegroundWindow.ModuleName == "firefox.exe" ||
           ctx.ForegroundWindow.ModuleName == "opera.exe" ||
           ctx.ForegroundWindow.ModuleName == "iexplore.exe" ||
          (ctx.ForegroundWindow.ModuleName == "explorer.exe" &&
               ctx.PointedWindow.ClassName == "DirectUIHWND");
});

var VWManagerForBrowser = new VerticalWheelManager(
    400, // Duration in milliseconds for suppression of wheel events given after once it have emitted.
    6    // Max number of the wheel events which will be suppressed in the duration for suppression.
);

Browser.
@on(RightButton).
@if(WheelUp).
@do((ctx) =>
{
    if (VWManagerForBrowser.Up.Check())
    {
        SendInput.Multiple().
        ExtendedKeyDown(VK_CONTROL).
        ExtendedKeyDown(VK_SHIFT).
        ExtendedKeyDown(VK_TAB).
        ExtendedKeyUp(VK_TAB).
        ExtendedKeyUp(VK_SHIFT).
        ExtendedKeyUp(VK_CONTROL).
        Send(); // Previous tab
    }
});

Browser.
@on(RightButton).
@if(WheelDown).
@do((ctx) =>
{
    if (VWManagerForBrowser.Down.Check())
    {
        SendInput.Multiple().
        ExtendedKeyDown(VK_CONTROL).
        ExtendedKeyDown(VK_TAB).
        ExtendedKeyUp(VK_TAB).
        ExtendedKeyUp(VK_CONTROL).
        Send(); // Next tab
    }
});