rc (ULONG) - returns

Return codes.

The handling routine in the presentation driver returns a LONG integer. Valid values are:

DPDM_ERROR

Error.
DPDM_NONE
There are no settable options.
>0
The number of bytes for the required DRIVDATA structure when the input pointer pDriverData is equal to NULL.
DEV_OK
The data block pointed to by the input parameter pDriverData was initialized when the pDriverData input pointer is not equal to NULL.

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