_LASTWHEEL - QB64Official/qb64 GitHub Wiki

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 ERROR Codes may occur.
  • Devices include keyboard (reported as 1), mouse (reported as 2), joysticks, game pads and multiple stick game controllers.

Example(s)

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