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Asked: 2026-06-18T00:08:53+00:00

I am using a NFC reader to read the UID of a M1 card

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I am using a NFC reader to read the UID of a M1 card and I would like to insert this UID string to anywhere the cursor currently is.
e.g. in the url box, in notepad, (just like a “barcode” reader input device, but with NFC UID this time)

I have implemented the function for reading the UID, and now I would like to do my second part – to insert the UID to anywhere the cursor is.

I am using Visual C++, any idea?

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1 Answer

  1. Editorial Team

    If you want to simulate a keypress, you can add input events:

    INPUT inp;

inp.ki.dwFlags = 0;
inp.ki.wVk = 'A';
inp.ki.wScan = 0;
inp.ki.time = 0;
inp.ki.dwExtraInfo = NULL;
inp.type = INPUT_KEYBOARD;

SendInput(1, (LPINPUT) &inp, sizeof(inp));

inp.ki.dwFlags = KEYEVENTF_KEYUP;

SendInput(1, (LPINPUT) &inp, sizeof(inp));

    That sends a key-down, followed by a key-up for the ‘A’ key. You can submit an array of those structures in a single call, I’ve omitted that for clarity. Note also that the key is not ascii, but a VK code. It just so happens that the alpha keys are represented by their upper-case value.

    Obviously if the user happens not to have the cursor somewhere that they want characters to be entered, bad/unexpected things may happen.

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