_LASTWHEEL

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The _LASTWHEEL function returns the number of wheels a specified number INPUT device on your computer has.


Syntax

wheelCount% = _LASTWHEEL(deviceNumber)


  • Returns the number of wheels that can be used on a specified device number within the number of _DEVICES found.
  • A valid number can be sent to the _WHEEL function to find any relative positive or negative wheel movements.
  • The devices are listed in a numerical order determined by the OS and can be read by the _DEVICE$ function.
  • The _DEVICES function must be read before using _LASTWHEEL or an "Illegal Function Call" error may occur.
  • Devices include keyboard (reported as 1), mouse (reported as 2), joysticks, game pads and multiple stick game controllers.


Examples

Example: Checking for the system's input devices and number of wheels available.

devices = _DEVICES  'MUST be read in order for other 2 device functions to work!
PRINT "Number of input devices found ="; devices
FOR i = 1 TO devices
  PRINT _DEVICE$(i)
  IF INSTR(_DEVICE$(i), "[WHEEL]") THEN PRINT "Wheels:"; _LASTWHEEL(i)
NEXT
Number of input devices found = 2
[KEYBOARD][BUTTON]
[MOUSE][BUTTON][AXIS][WHEEL]
Wheels: 3
Note: A mouse may have 3 wheels listed when there is only one scroll wheel.


See also



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