Writing Windows WDM Device Drivers

NumLock HID_USAGE_LED_NUM_LOCK 19 01 Usage Maximum kana HID_USAGE_LED_KANA 29 05 Output (Data, Variable, Absolute) 91 02 LEDs Report Size 3 75 03 Report Count 1 95 01 Output (Constant) 91 01 padding Usage Page (Key Codes) HID_USAGE_PAGE_KEYBOARD 05 07 Usage Minimum 0 19 00 Usage Maximum 101 29 65 Report Count 6 95 06 Report Size 8 75 08 Logical Minimum 0 15 00 Logical Maximum 101 25 65 Input (Data Array) 81 00 Key array (6 bytes) End collection