DOC: Port I/O Functions Not Included in DLL Version of CRT (140503)


The information in this article applies to:

  • Microsoft Visual C++ 4.0
This article was previously published under Q140503

SUMMARY

The Run-Time Library Reference descriptions for the _inp, _inpw, _inpd, _outp, _outpw, and _outpd functions incorrectly indicate that they are included in Msvcrt.lib (or Msvcrtx0.dll). These functions were never intended for export from the DLL version of the C run-time library (CRT), and do not exist in that version of the CRT.

A build of a project that uses the DLL version of the CRT may fail at link time with LNK2001 errors and one or more of the following functions reported as unresolved externals: 
   _inp, _inpw, _inpd, _outp, _outpw, _outpd
To use these functions, you need to link with one of the static versions of the CRT -- Libc.lib or LIBCMT.lib.
Modification Type:MajorLast Reviewed:8/3/2001
Keywords:kbCRT kbdocerr kbdocfix KB140503
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