mirror of
https://github.com/QB64Official/qb64.git
synced 2024-08-22 11:25:08 +00:00
49 lines
1.7 KiB
Markdown
49 lines
1.7 KiB
Markdown
The [_LASTBUTTON](_LASTBUTTON) function returns the number of buttons a specified INPUT device on your computer has.
|
|
|
|
## Syntax
|
|
|
|
> buttonCount% = _[_LASTBUTTON](_LASTBUTTON)(deviceNumber)
|
|
|
|
* Returns the number of buttons that can be read on a specified device number within the number of [_DEVICES](_DEVICES) found.
|
|
* A valid number can be sent to the [_BUTTON](_BUTTON) or [_BUTTONCHANGE](_BUTTONCHANGE) function to find any button events.
|
|
* The specific device name and functions can be found by the [_DEVICE$](_DEVICE$) function [STRING](STRING).
|
|
* The devices are listed in a numerical order determined by the OS and can be read by the [_DEVICE$](_DEVICE$) function.
|
|
* **The [_DEVICES](_DEVICES) function must be read before using _LASTBUTTON or an [ERROR Codes](ERROR-Codes) will 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.
|
|
|
|
```vb
|
|
|
|
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$(i)
|
|
PRINT "Buttons:"; _LASTBUTTON(i)
|
|
NEXT
|
|
|
|
```
|
|
|
|
```text
|
|
|
|
Number of input devices found = 2
|
|
[KEYBOARD][BUTTON]
|
|
Buttons: 512
|
|
[MOUSE][BUTTON][AXIS][WHEEL]
|
|
Buttons: 3
|
|
|
|
```
|
|
|
|
> Note: The [STRIG](STRIG)/[STICK](STICK) commands won't read from the keyboard or mouse device the above example lists.
|
|
|
|
## See Also
|
|
|
|
* [_LASTAXIS](_LASTAXIS), [_LASTWHEEL](_LASTWHEEL)
|
|
* [_AXIS](_AXIS), [_BUTTON](_BUTTON), [_WHEEL](_WHEEL)
|
|
* [_DEVICES](_DEVICES), [_DEVICE$](_DEVICE$)
|
|
* [_DEVICEINPUT](_DEVICEINPUT)
|
|
* [_MOUSEBUTTON](_MOUSEBUTTON)
|
|
* [STRIG](STRIG), [STICK](STICK)
|
|
* [ON STRIG(n)](ON-STRIG(n)), [STRIG(n)](STRIG(n))
|