Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 244)

API Library of Routines
Appendix B
MSG_ZERO_MASK
B-113
Zeros all bits in the specified mask.
C Syntax
#include
unsigned MSG_ZERO_MASK (mask)
unsigned *mask;
Parameters
mask
This is the address of the read or write mask used with the MSG_WAIT
function. This function will reset all bits in the mask.
Returns
Status Symbolic Name Meaning
0 CC_SUCCESS Operation successful
Description
Use the MSG_ZERO_MASK function to zero bits in the message
read/write masks.
C Example
See MSG_WAIT on page B-102 for a complete example of asynchronous
message processing.
MSG_ZERO_MASK