For a native Windows app, handle WM_MOUSEHWHEEL (0x020E) in the window procedure for the window or control that owns the content. Read its signed wheel delta, map that delta to horizontal movement, and return zero when handled. If the window does not handle the message, let DefWindowProc pass it through the parent chain.
Handle the standard horizontal-wheel message
Windows sends WM_MOUSEHWHEEL to the active window when the horizontal wheel is tilted or rotated. The message is usually the right starting point for ordinary app scrolling: it supplies direction and movement, without requiring device-specific input registration. See Microsoft’s WM_MOUSEHWHEEL documentation.
- Choose the receiving window. Handle the message in the window procedure of the window or control responsible for scrolling the content.
- Read the signed wheel delta. Use
GET_WHEEL_DELTA_WPARAM(wParam). A positive value means scroll right; a negative value means scroll left. - Convert the delta to your app’s movement unit. Decide whether the control moves by pixels, columns, items, or another useful unit, and apply that mapping consistently.
- Finish message handling correctly. If your window processes the message, return zero. If it does not, call or defer to
DefWindowProcso Windows can propagate the unhandled message to parent windows. Do not manually forward it inside the window procedure.
Preserve partial wheel movement
WHEEL_DELTA is 120, but an input device may report smaller deltas. Do not assume each message represents one complete wheel notch. Windows documents the same delta convention for the vertical WM_MOUSEWHEEL message and permits finer-resolution input; see Microsoft’s WM_MOUSEWHEEL documentation.
Two common approaches are to accumulate deltas until they reach your chosen threshold, or to convert each partial delta proportionally into movement. The right choice depends on the control: accumulation can suit discrete item or column movement, while proportional movement can preserve finer input for pixel-based scrolling.
#1 Best Overall
- Experience enhanced comfort and productivity with the Anker 2.4G Wireless Vertical Ergonomic Optical Mouse. Its scientifically designed ergonomic structure promotes a healthy neutral "handshake" wrist and arm position, reducing strain and amplifying your productivity.(Uses 2.4 GHz wireless via a USB receiver, not Bluetooth.)
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- The package offers a comprehensive set and warranty. It includes: 1 Anker Wireless Vertical Ergonomic Optical Mouse (2 AAA batteries not included), 1 2.4G USB receiver (stored in the mouse's bottom), 1 instruction manual. We extend an 18-month hassle-free warranty for your peace of mind.
Read the cursor coordinates safely when needed
The message’s lParam contains cursor coordinates in screen coordinates. If your handler needs those coordinates, use GET_X_LPARAM(lParam) and GET_Y_LPARAM(lParam). They are signed values, unlike extracting the words with LOWORD and HIWORD; signed handling matters on multi-monitor desktops where a screen coordinate can be negative. Microsoft’s message reference documents the message parameters.
Use Raw Input only for device-specific handling
Use Raw Input if the app needs to identify the originating device or distinguish between multiple mice. The app registers a receiving window with RegisterRawInputDevices, then processes WM_INPUT and can inspect RAWMOUSE for RI_MOUSE_HWHEEL and the signed delta in usButtonData. Microsoft’s references cover Raw Input, RegisterRawInputDevices, and the RAWMOUSE structure.
Rank #2
- 【Seamless Switching Between Three Devices】The ergonomic mouse features Bluetooth (5.0/3.0) and 2.4GHz USB A modes for connectivity. When connected via Bluetooth, The vertical mouse can effectively reduce the usage of your USB-A port (Bluetooth mode can connect to two devices simultaneously). In 2.4GHz connection mode, simply plug in the USB receiver for a quick connection. Press and hold the bottom button of the mouse for 3 seconds to enter the connection and pairing state. Short press the button to switch connection modes and improve work efficiency.(Note: The 2.4GHz receiver is built into the bottom of the mouse).
- 【Higher DPI & 6 Adjustable Levels】This vertical ergonomic mouse is equipped with a high-performance chip and features 6 adjustable DPI levels (4800/3200/2400/1600/1200/800) to meet your daily needs. wireless mouse upgraded technology allows this ergonomic mouse to operate smoothly on different types of surfaces. When changing the DPI, the light will flash, with the number of flashes corresponding to the DPI level.
- 【Silent Mouse】This computer mouse operates quietly, allowing for usage even in quiet environments like libraries. Additionally, the vertical mouse provides nearly silent clicks, helping avoid disturbances to others and ensuring your work or study remains undisturbed (Note: Only the left and right click buttons of the mouse are silent; other function buttons are not silent).
- 【Ergonomic Design】The wireless mouse's ergonomic design offers ultimate comfort by placing your palm at a near-vertical angle on the desktop, reducing pressure and pain on your wrist caused by prolonged inverted mouse usage (Note: Mouse is designed for right-handed use only).
- 【Broad Compatibility and Low Battery Warning】The wireless computer mouse is compatible with various devices, including Windows, Mac, Chrome, and Linux laptops (side buttons are not compatible with macOS). Additionally, this bluetooth mouse for laptops automatically enters deep sleep mode after approximately 10-30 minutes of inactivity to conserve power; you can awake it by pressing the right or left button. Note: We recommend using branded batteries to ensure the mouse's longevity. When the battery is low, the LED light will blink (Requires 2 AAA batteries, not included).
Raw Input has an ownership constraint: Microsoft warns that only one window per raw input device class can be registered to receive raw input within a process. A library that registers devices can therefore interfere with the host app’s input handling. Keep registration under the app’s control unless device-specific input is genuinely necessary.
| Route | Use it when | Input and ownership |
|---|---|---|
WM_MOUSEHWHEEL |
The app needs ordinary horizontal scrolling in a window or control. | Uses the normal window-message path and allows unhandled messages to propagate through DefWindowProc. |
| Raw Input | The app needs device-specific data or must distinguish input devices. | Requires device registration and WM_INPUT handling; a process has one receiving window per raw input device class. |
Hardware is optional; app support is not
A mouse with a horizontal wheel is one way to generate horizontal-wheel input, but the app still needs to process that input. Windows exposes the fHasHorizontalWheel capability in its RID_DEVICE_INFO_MOUSE structure. A horizontal-wheel mouse is not a prerequisite for implementing support in software.
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Rank #3
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- Relax into focus: Settle into work with a wireless computer mouse featuring easy-to-reach customizable buttons, whisper-quiet clicks, and a SmartWheel for smooth, seamless scrolling
- Ergo-certified: Lift wireless vertical mouse has been designed, developed, tested, and approved according to criteria set out by leading ergonomists
Framework and platform scope
WM_MOUSEHWHEEL is a Windows desktop window message; Microsoft’s documentation lists Windows Vista as its minimum supported client. This procedure describes the native window-message route. WinForms, WPF, and other UI frameworks may provide framework-level input hooks, but the appropriate hook and code depend on the framework and are not specified here.
Quick Recap
Best Value
- Precision you can feel with the Haptic Sense Panel; customizable (1) haptic feedback on specific actions, shortcuts, notifications enhancing productivity on this wireless Bluetooth mouse
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Rank #4
- Perfect Fit for Small to Medium Hands: Designed specifically for hand lengths under 7.5 inches (19.05 cm), the EM11 NL reduces wrist strain by aligning with your natural grip. Please measure the size before ordering for a better fit and more comfort
- Connect up to 3 Devices: This ergonomic wireless mouse features dual Bluetooth connectivity and 2.4G USB-A connectivity modes for simultaneous connection of up to 3 different devices, and is compatible with Windows 8, Windows 10 or higher, Mac OS X 10.12 or higher, and Android 4.3 or higher
- Rechargeable Ergonomic Mouse: The Bluetooth Vertical Mouse has a built-in 500mAh Li-Ion battery that can be conveniently recharged using the included Type-C cable(The Type-C cable is for charging only)
- Ergonomic Vertical Design: The ergonomic mouse wireless keeps your wrist naturally straight, putting your forearm and wrist in a more natural and relaxed position, which can reduce discomfort and strain, helping to improve productivity and reduce the risk of repetitive strain injuries compared to a standard mouse. Warm tips: We encourage you to relax your palm and hold the mouse naturally when using a vertical mouse
- Learning curve: Since it takes a learning curve to get used to the shape when using our ergonomic mouse for the first time, it may cause inconvenience to your mouse grip, We recommend that you take 1-2 weeks to get used to it, as many users find that it will help reduce the pressure and pain on your wrist caused by long-term use of the mouse and improve comfort
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