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


wheel_count% = _LASTWHEEL(device_number)

  • 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(1), mouse(2), joysticks, game pads and multiple stick game controllers.

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.

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