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49 lines
1.5 KiB
Plaintext
49 lines
1.5 KiB
Plaintext
{{QBDLDATE:05-20-2022}}
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{{QBDLTIME:23:07:49}}
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{{DISPLAYTITLE:_DEVICES}}
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The [[_DEVICES]] function returns the number of INPUT devices on your computer including keyboard, mouse and game devices.
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{{PageSyntax}}
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: {{Parameter|device_count%}} = [[_DEVICES]]
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{{PageDescription}}
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* Returns the number of devices that can be listed separately with the [[_DEVICE$]] function by the device number.
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* Devices include keyboard, mouse, joysticks, game pads and multiple stick game controllers.
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* '''Note: This function must be read before trying to use the [[_DEVICE$]], [[_DEVICEINPUT]] or _LAST control functions.'''
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{{PageExamples}}
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''Example:'' Checking for the system's input devices.
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{{CodeStart}}
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devices = {{Cl|_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 {{Cl|_DEVICE$}}(i)
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PRINT "Buttons:"; {{Cl|_LASTBUTTON}}(i)
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NEXT
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{{CodeEnd}}
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{{OutputStart}}Number of input devices found = 2
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[KEYBOARD][BUTTON]
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Buttons: 512
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[MOUSE][BUTTON][AXIS][WHEEL]
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Buttons: 3
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{{OutputEnd}}
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:Note: The [[STRIG]]/[[STICK]] commands won't read from the keyboard or mouse device the above example lists.
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{{PageSeeAlso}}
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* [[_DEVICE$]], [[_DEVICEINPUT]]
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* [[_LASTBUTTON]], [[_LASTAXIS]], [[_LASTWHEEL]]
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* [[_BUTTON]], [[_BUTTONCHANGE]]
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* [[_AXIS]], [[_WHEEL]]
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* [[_MOUSEINPUT]], [[_MOUSEX]], [[_MOUSEBUTTON]]
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* [[STRIG]], [[STICK]]
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* [[ON STRIG(n)]], [[STRIG(n)]]
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* [[Controller Devices]]
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{{PageNavigation}}
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