## Physical Device Driver Reference

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### KBD_QUERYKBDCODEPAGESUPPORT (7Bh) - Data Length

Data Length The input return data length requested or the output data structure length required, in bytes. On input, the length field value specifies the caller's return data area size. A minimum value of 2 is required so that the length value can be properly returned. An INVALID_ PARM error code is returned for input length values less than 2.

On output, the remaining returned data depends on the input length field value. Length field values of 12 bytes or greater result in the full data structure being returned. For length requests less than 12, only the portion of returned data fields that can be completely returned (including ASCIIZ string terminators) is returned. The Length field on return always represents the byte count of returned data including string terminators.