INT 2fH 1000H: Is Share.Exe Installed?
Compatibility: 3.0+
Expects: AX 1000H
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Returns: AL status: 00H = is not installed
ffH = is installed
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Info: Checks to see if the DOS SHARE.EXE program (which provides file-
locking functions) has been executed and is resident in memory.
Notes: Windows (and maybe others) intercept this vector and always
return a non-zero.
To really check to see if file-sharing support is installed, try
locking a file via DOS fn 5cH and check the error/return code.
See Also: INT 2fH: Multiplex Interrupt
DOS Functions
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