Fix Windows mouse wheel

[djalan]

Hello

Scrolling with the mouse wheel in Windows was not working very well. We were calling the function by passing the wrong dwData value.

• 1 instead of 120
• 2 instead of 240
• -1 instead of -120
• etc.

All changes are explained by below documentation.

https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-mouse_event

[in] dwData

Type: DWORD

If dwFlags contains MOUSEEVENTF_WHEEL, then dwData specifies the amount of wheel movement. A positive value indicates that the wheel was rotated forward, away from the user; a negative value indicates that the wheel was rotated backward, toward the user. One wheel click is defined as WHEEL_DELTA, which is 120.

If dwFlags contains MOUSEEVENTF_HWHEEL, then dwData specifies the amount of wheel movement. A positive value indicates that the wheel was tilted to the right; a negative value indicates that the wheel was tilted to the left.

If dwFlags contains MOUSEEVENTF_XDOWN or MOUSEEVENTF_XUP, then dwData specifies which X buttons were pressed or released. This value may be any combination of the following flags.

If dwFlags is not MOUSEEVENTF_WHEEL, MOUSEEVENTF_XDOWN, or MOUSEEVENTF_XUP, then dwData should be zero.