Print Page - Detect NumPad

Title: Detect NumPad
Post by: jj2007 on May 09, 2015, 05:21:47 AM

My idea was to test if the notebook has, hardware-wise, a NumPad or not:

CheckKeyboard proc
LOCAL bytes, rid:RID_DEVICE_INFO, devs[100]:RAWINPUTDEVICELIST
  m2m rid.cbSize, RID_DEVICE_INFO
  push 127
  mov eax, esp
  invoke GetRawInputDeviceList, addr devs, eax, RAWINPUTDEVICELIST
  pop ecx
  For_ ebx=0 To eax-1
	imul ecx, ebx, RAWINPUTDEVICELIST
	.if devs.dwType[ecx]==RIM_TYPEKEYBOARD
		m2m bytes, RID_DEVICE_INFO
		push ecx
		invoke GetRawInputDeviceInfo, devs.hDevice[ecx], RIDI_DEVICEINFO, addr rid, addr bytes
		pop ecx
		Print Str$("\n## %i keys", rid.keyboard.dwNumberOfKeysTotal)
		Print Str$("\ndwType      \t%i", rid.keyboard.dwType)
		Print Str$("\ndwSubType\t%i", rid.keyboard.dwSubType)
		Print Str$("\ndwNumberOfFunctionKeys\t%i", rid.keyboard.dwNumberOfFunctionKeys)
		Print Str$("\ndwNumberOfIndicators\t%i", rid.keyboard.dwNumberOfIndicators)
		Print Str$("\ndwKeyboardMode\t%i\n", rid.keyboard.dwKeyboardMode)
	.endif
  Next
  ret
CheckKeyboard endp

Full source & exe attached. The problem: My two notebooks report 101 keys, and all the rest is also identical:

Code Select

## 101 keys
dwType          81
dwSubType       0
dwNumberOfFunctionKeys  12
dwNumberOfIndicators    3
dwKeyboardMode  1

## 101 keys
dwType          4
dwSubType       0
dwNumberOfFunctionKeys  12
dwNumberOfIndicators    3
dwKeyboardMode  1

But only one does have a real, physical NumPad, the other one has only a NumLock key that makes u i o behave like 4 5 6 etc.

Any ideas?

Title: Re: Detect NumPad
Post by: MichaelW on May 09, 2015, 09:34:29 PM

My notebook does have a number pad, are these the results you expect?:

Code Select


## 101 keys
dwType          7
dwSubType       0
dwNumberOfFunctionKeys  12
dwNumberOfIndicators    3
dwKeyboardMode  1

Title: Re: Detect NumPad
Post by: jj2007 on May 09, 2015, 10:57:17 PM

Thanks, Michael.

Yes, looks very similar to mine (I wonder why I got two of them, for both notebooks ::))

I had hoped to see a difference in the total number of keys, but apparently the virtual "Fn" keys are added to the physical key count, so numpad or not, you get the same results. It's opaque to the programmer :(

Title: Re: Detect NumPad
Post by: sinsi on May 10, 2015, 07:46:20 AM

Code Select

mov answer, input("Does your laptop have a separate NumPad?")
:biggrin:

Title: Re: Detect NumPad
Post by: jj2007 on May 10, 2015, 09:34:12 AM

That is indeed the only solution, it seems. Incredible that there is no numpad detector among the many thousand Windows API functions :(

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General => The Workshop => Topic started by: jj2007 on May 09, 2015, 05:21:47 AM