Microsoft KB Archive/65404

= Solve Basic 6.0 &quot;Unresolved External&quot; with OS/2's DOSCALLS.LIB =

Article ID: 65404

Article Last Modified on 11/21/2006



This article was previously published under Q65404



SUMMARY
When you are creating Microsoft Basic Compiler versions 6.00 and 6.00b protected mode programs that make calls to OS/2 API functions, the DOSCALLS.LIB library must be linked in. This library allows the linker to resolve external references to the API functions.

However, the DOSCALLS.LIB that comes with Basic will not allow the linker to resolve references to all of the API functions. This version of DOSCALLS.LIB was designed to support only a subset of them. The linker can use the DOSCALLS.LIB that comes with OS/2 to resolve those external references to API functions that are not supported by the Basic version of DOSCALLS.LIB.

This information applies to Microsoft Basic Compiler versions 6.00 and 6.00b for MS OS/2.



MORE INFORMATION
If an API function is not supported by the Basic version of DOSCALLS.LIB, the linker will generate an &quot;Unresolved external&quot; error if it finds a call to it in an object file. To remedy the situation, the program must be linked with the OS/2 version of DOSCALLS.LIB. This version of DOSCALLS.LIB is usually placed in the main OS/2 directory (C:\OS2, for example) by the OS/2 installation program.

Note that Microsoft Basic Professional Development System versions 7.00 and 7.10 for MS OS/2 use a library named OS2.LIB (instead of DOSCALLS.LIB) to resolve external references to API functions. OS2.LIB provides support for all API functions, so linking with the OS/2 version of DOSCALLS.LIB should never be necessary in Basic PDS 7.00 and 7.10.

Additional query words: BasicCom

Keywords: KB65404

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