Why does GetRawInputData always return null as dHandle?

Question

I'm writing an input/output handling middleware in D, and whenever I call GetRawInputData, I always get null for dHandle. No, I don't have a high-precision trackpad, and I also getting it from every input source, be it a keyboard or a mice. I registered the input devices, so I'm getting the input events, but not the device handles, and I cannot find anything in the documentation about any other steps which can be done, and otherwise I'm only getting information about this kind of behavior related to said trackpads, not all input devices.

Answer 1

Hello there,

Ensure that you are calling the GetRawInputData function correctly. It requires the appropriate parameters to retrieve the data correctly.

GetRawInputData is a Windows API function that retrieves data from a raw input device. It's commonly used to capture input from devices like keyboards, mice, and other human interface devices (HID). The dHandle parameter in the context of GetRawInputData is a handle to the data that the function retrieves.

One of the parameters for the GetRawInputData function is the size of the buffer (pData) you're providing to receive the input data. If the buffer size is not set correctly, it could lead to issues like null handles being returned.

Hope this resolves your Query !!

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