Find property for Touch-/ Trackpad by RawInputDeviceInfo to distinguish independent of the model/ manufacturer in registry

Question

Hello,
I want to recognize, if the input is coming from the touch-/ trackpad independent of the Laptop model/ manufacturer.
Is it possible?

I'm getting the devicename by RawInputDeviceInfo and i see that there is the possibility to compare it with the registry entries but i can't see any property that tells me that it's the trackpad.

Registry path:

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\HID...

Regards

Answer 1

Since i want to track the wheel scrolling (also by RawInput), it doesn't make sense to search further because it's a lack of the api:

https://stackoverflow.com/questions/57552844/rawinputheader-hdevice-null-on-wm-input-for-laptop-trackpad

https://stackoverflow.com/questions/47005610/x-and-y-coordinate-from-precision-touchpad-with-raw-input

Any help is always appreciated.

Regards

MS Feedback Hub: https://insider.windows.com/en-us/feedbackhub/fb?contextid=386&feedbackid=91027b01-644f-4dc8-beb6-55551c16a8bd&form=1

Answer 2

Hello, @youki

If you want to know whether the input comes from the touchpad, you can use GetCurrentInputMessageSource to retrieve the source of the input message.

The INPUT_MESSAGE_SOURCE structure that holds the device type and the ID of the input message source.

typedef enum tagINPUT_MESSAGE_DEVICE_TYPE {  
  IMDT_UNAVAILABLE,  
  IMDT_KEYBOARD,  
  IMDT_MOUSE,  
  IMDT_TOUCH,  
  IMDT_PEN,  
  IMDT_TOUCHPAD  
} INPUT_MESSAGE_DEVICE_TYPE;  

Note: [Windows 8 desktop apps only

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