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47 lines
1.7 KiB
Plaintext
47 lines
1.7 KiB
Plaintext
{{QBDLDATE:05-20-2022}}
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{{QBDLTIME:23:08:55}}
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{{DISPLAYTITLE:_LASTWHEEL}}
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The [[_LASTWHEEL]] function returns the number of wheels a specified number INPUT device on your computer has.
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{{PageSyntax}}
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: {{Parameter|wheelCount%}} = [[_LASTWHEEL]]({{Parameter|deviceNumber}})
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* Returns the number of wheels that can be used on a specified device number within the number of [[_DEVICES]] found.
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* A valid number can be sent to the [[_WHEEL]] function to find any relative positive or negative wheel movements.
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* The devices are listed in a numerical order determined by the OS and can be read by the [[_DEVICE$]] function.
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* '''The [[_DEVICES]] function must be read before using _LASTWHEEL or an [[ERROR Codes|"Illegal Function Call" error]] may occur.'''
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* Devices include keyboard (reported as 1), mouse (reported as 2), joysticks, game pads and multiple stick game controllers.
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{{PageExamples}}
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''Example:'' Checking for the system's input devices and number of wheels available.
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{{CodeStart}}
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devices = {{Cl|_DEVICES}} 'MUST be read in order for other 2 device functions to work!
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PRINT "Number of input devices found ="; devices
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FOR i = 1 TO devices
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PRINT {{Cl|_DEVICE$}}(i)
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IF {{Cl|INSTR}}({{Cl|_DEVICE$}}(i), "[WHEEL]") THEN PRINT "Wheels:"; {{Cl|_LASTWHEEL}}(i)
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NEXT
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{{CodeEnd}}
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{{OutputStart}}Number of input devices found = 2
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[KEYBOARD][BUTTON]
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[MOUSE][BUTTON][AXIS][WHEEL]
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Wheels: 3
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{{OutputEnd}}
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: ''Note:'' A mouse may have 3 wheels listed when there is only one scroll wheel.
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{{PageSeeAlso}}
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* [[_LASTBUTTON]], [[_LASTAXIS]]
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* [[_AXIS]], [[_BUTTON]], [[_WHEEL]]
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* [[_DEVICE$]], [[_DEVICES]]
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* [[_MOUSEBUTTON]]
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* [[STRIG]], [[STICK]]
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* [[ON STRIG(n)]], [[STRIG(n)]]
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{{PageNavigation}}
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