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'''_MOUSEWHEEL ''' function returns an [[INTEGER]] value which can be negative or positive or 0.
The _MOUSEWHEELfunction returns [[INTEGER]] value .
''Syntax: '' scroll% = _MOUSEWHEEL
: %= _MOUSEWHEEL
Positive values represent how many "clicks" the mouse wheel has been moved up.
Negative values represent how many "clicks" the mouse wheel has been moved down.
* up .
Return values are relative to the last time [[_MOUSEINPUT]] was used, so if no movement on the wheel has occurred since the last time, _MOUSEWHEEL returns 0.
* has been .
* no movement on the wheel has occurred since the last , _MOUSEWHEELreturns 0.
''See also:'' [[_MOUSEINPUT]], [[_MOUSEX]], [[_MOUSEY]], [[_MOUSEBUTTON]], [[_MOUSESHOW]], [[_MOUSEHIDE]]
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