OnIrp events

The OnIrp event provides low-level to device driver.  

OnIrp(
 LONG MajorFunction,// Major I/O request function
 LONG IoControlCode,// Device Control Code
 VARIANT_BOOL bUpDown,// Request direction
 LONG Status,// Return status
 VARIANT Data,// Sent/received data
 LONG LowTimestamp,// Low-order part of timestamp
 LONG HighTimestamp// High-order part of timestamp
);


Parameters
  MajorFunction     [in] The Serial-specific operation of the major I/O requests   ControlCode     [in] I/O device control requests   bUpDown     [in] This parameter defines the direction of the request and has the following values:

TRUE (UP) Data will contain the data that are stored in input buffer of IRP packet
FALSE (DOWN) Data will contain the data that are stored in output buffer of IRP packet

  Status     [in] This parameter contains the return status of operation. You may use it to confirm that request succeeded or receive ERROR code in failure. If bUpDown parameter is equal to FALSE then Status value is ignored   Data     [in] This parameter contains the input/output buffer data of IRP request depending on bUpDown value   LowTimestamp     [in] This parameter is a low-order part of the structure FILETIME. This is the timestamp when IRP was generated.   HighTimestamp     [in] This parameter is a high-order part of the structure FILETIME. This is the timestamp when IRP was generated.