Int 21/AH=3Eh

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DOS 2+ - CLOSE - CLOSE FILE

AH = 3Eh
BX = file handle

Return:
CF clear if successful AX destroyed CF set on error AX = error code (06h) (see #01680 at AH=59h/BX=0000h)

Notes: If the file was written to, any pending disk writes are performed, the time and date stamps are set to the current time, and the directory entry is updated. Recent versions of DOS preserve AH because some versions of Multiplan had a bug which depended on AH being preserved

See Also: AH=10h - AH=3Ch - AH=3Dh - INT 2F/AX=1106h

Category: DOS Kernel - Int 21h - D

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