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Thread: How to modify scan code of WDM keyboard filter driver

  1. #1
    Join Date
    Jan 2012
    Posts
    103

    How to modify scan code of WDM keyboard filter driver

    There is an existing WDM keyboard filter driver which has some special features. Now I have to set the all scan codes the flag KEYBD_DEVICE_ID1. For that reason I have searched over the driver’s source code but I didn’t able to locate the buffer that contains the full 4 byte scan code (DWORD). I have gone through the MSDN documentation but still didn’t able to find that code in order to modify it?

  2. #2
    Join Date
    Nov 2010
    Posts
    73

    Re: How to modify scan code of WDM keyboard filter driver

    As I know that the scan codes are reported like single bytes inside the EYBOARD_INPUT_DATA array. This array is passed to the service callback routine (I am assuming that the filter below kbdclass). But what makes you think that it is a 4 byte scan code

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