DTL_READ_PREDEFINE_ITEM
The function DTL_READ_PREDEFINE is used to read the predefine tag string synchronously, and the response data will be stored into pBuf.
Below predefine tags are supported:
- @GlobalMsgQueueCount
- @TrackedStateValue
DTL_RETVAL DTL_READ_PREDEFINE_ITEM (
itemname, target, pBuf, len
)const char* itemname | /* predefine item name, could not be null |
DTSA_TYPE* target | /* pointer to a DTSA |
BYTE* pBuf | /* used to store the response data, could not be null |
int len | /* the size of the pBuf |
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