_LASTBUTTON
Revision as of 18:09, 6 September 2017 by imported>SMcNeill (style guidelines)
The _LASTBUTTON function returns the number of buttons a specified INPUT device on your computer has.
Syntax
- buttonCount% = __LASTBUTTON(deviceNumber)
- Returns the number of buttons that can be read on a specified device number within the number of _DEVICES found.
- A valid number can be sent to the _BUTTON or _BUTTONCHANGE function to find any button events.
- The specific device name and functions can be found by the _DEVICE$ function string.
- 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 _LASTBUTTON or an "Illegal Function Call" error will 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.
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$(i) PRINT "Buttons:"; _LASTBUTTON(i) NEXT
Number of input devices found = 2 [KEYBOARD][BUTTON] Buttons: 512 [MOUSE][BUTTON][AXIS][WHEEL] Buttons: 3
- Note: The STRIG/STICK commands won't read from the keyboard or mouse device the above example lists.
See also
- _LASTAXIS, _LASTWHEEL
- _AXIS, _BUTTON, _WHEEL
- _DEVICES, _DEVICE$
- _DEVICEINPUT
- _MOUSEBUTTON
- STRIG, STICK
- ON STRIG(n), STRIG(n)