The function only cancels I/O operations in the current process, regardless of which thread created the I/O operation. Marks any outstanding I/O operations for the specified file handle. In this section FunctionĪdds user keys to the specified encrypted file.ĭetermines whether the file I/O functions are using the ANSI or OEM character set code page.Ĭancels all pending input and output (I/O) operations that are issued by the calling thread for the specified file. The following functions are used to manage files.