FTSPCPurgeFlags Constants

ftspcPurgeNone 0 There are no read/write operations.
ftspcPurgeAbort 1 Terminates outstanding overlapped write (or read) operations and returns immediately, even if the write (read) operations have not been completed.
ftspcPurgeClear 2 Clears the output (input) buffer (if the device driver has one).
ftspcPurgeAbortClear 3 Combination of two previous elements (PurgeAbort, PurgeClear).