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50 lines
1.7 KiB
Markdown
50 lines
1.7 KiB
Markdown
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The [_LASTBUTTON](_LASTBUTTON) function returns the number of buttons a specified INPUT device on your computer has.
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## Syntax
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> buttonCount% = _[_LASTBUTTON](_LASTBUTTON)(deviceNumber)
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* Returns the number of buttons that can be read on a specified device number within the number of [_DEVICES](_DEVICES) found.
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* A valid number can be sent to the [_BUTTON](_BUTTON) or [_BUTTONCHANGE](_BUTTONCHANGE) function to find any button events.
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* The specific device name and functions can be found by the [_DEVICE$](_DEVICE$) function [STRING](STRING).
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* The devices are listed in a numerical order determined by the OS and can be read by the [_DEVICE$](_DEVICE$) function.
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* **The [_DEVICES](_DEVICES) function must be read before using _LASTBUTTON or an [ERROR Codes](ERROR-Codes) will 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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## Example(s)
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Checking for the system's input devices.
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```vb
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devices = _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 _DEVICE$(i)
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PRINT "Buttons:"; _LASTBUTTON(i)
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NEXT
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```
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```text
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Number of input devices found = 2
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[KEYBOARD][BUTTON]
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Buttons: 512
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[MOUSE][BUTTON][AXIS][WHEEL]
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Buttons: 3
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```
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> Note: The [STRIG](STRIG)/[STICK](STICK) commands won't read from the keyboard or mouse device the above example lists.
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## See Also
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* [_LASTAXIS](_LASTAXIS), [_LASTWHEEL](_LASTWHEEL)
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* [_AXIS](_AXIS), [_BUTTON](_BUTTON), [_WHEEL](_WHEEL)
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* [_DEVICES](_DEVICES), [_DEVICE$](_DEVICE$)
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* [_DEVICEINPUT](_DEVICEINPUT)
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* [_MOUSEBUTTON](_MOUSEBUTTON)
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* [STRIG](STRIG), [STICK](STICK)
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* [ON STRIG(n)](ON-STRIG(n)), [STRIG(n)](STRIG(n))
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