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CntrlParam

CntrlParam structure

#include <Files.h>

typedef struct CntrlParam { Size Offset Description

ParamBlockHeader 24 0 common fields of ParamBlock types

short ioCRefNum; 2 24 Device driver reference

short csCode; 2 26 Type of Control or Status call

short csParam[11]; 22 28 Control or status information

} CntrlParam; 50

Notes: This structure is used in Device Manager calls that request and provide

control and status information:

PBStatus PBControl

The most common way to use this structure is to allocate a union which is

an aggregate and create and initialize a pointer to the desired data type. See

ParamBlockRec for examples.

Referenced by (12):