DOCUMENT:Q104345  05-FEB-2000  [foxpro]
TITLE   :How to Determine If a Library Is Loaded in Memory
PRODUCT :Microsoft FoxPro
PROD/VER:MS-DOS:2.0,2.5,2.5a,2.5b,2.6; WINDOWS:2.5,2.5a,2.5b,2.6,2.6a,3.0
OPER/SYS:
KEYWORDS:kbcode

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The information in this article applies to:

 - Microsoft Visual FoxPro for Windows, version 3.0 
 - Microsoft FoxPro for Windows, versions 2.5, 2.5a, 2.5b, 2.6, 2.6a 
 - Microsoft FoxPro for MS-DOS, versions 2.0, 2.5, 2.5a, 2.5b, 2.6 
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SUMMARY
=======

To see if an external library (.PLB file in the MS-DOS environment, .FLL file in
the Windows environment) has been loaded by means of the SET LIBRARY TO command,
use the code example shown below.

MORE INFORMATION
================

The SET LIBRARY TO command allows API libraries to be loaded into memory. The
following code example will allow a program to determine if a specific library
has been loaded.

      * Use the set of commands appropriate for the product installed

      * From the FoxPro for MS-DOS root directory
      SET LIBRARY TO netware.plb ADDITIVE   &&Not avail. in 2.0 single user
      SET LIBRARY TO goodies\pdrivers\driver2.plb ADDITIVE

      * From the FoxPro for Windows root directory
      SET LIBRARY TO driver2.fll ADDITIVE
      SET LIBRARY TO foxtools.fll ADDITIVE

      *From the Visual FoxPro root directory
      SET LIBRARY TO reserved.fll ADDITIVE
      SET LIBRARY TO foxtools.fll ADDITIVE

      * In both MS-DOS and Windows:
      * To check if a library has been loaded:

      isloaded = "<the name of the library>" $ SET("LIBRARY")
      IF isloaded
         WAIT WINDOW "<Library name> has been loaded"
      ELSE
            WAIT WINDOW "<Library name> has not been loaded"
      ENDIF

      * To clear all libraries from memory
      SET LIBRARY TO

      * End code example

The SET("LIBRARY") function returns a string containing the names of all external
API libraries currently loaded, with a comma between the library names. The $
operator is used to search anywhere within the string for the name of a specific
library.

Additional query words: VFoxWin FoxDos FoxWin

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Keywords          : kbcode 
Technology        : kbVFPsearch kbAudDeveloper kbFoxproSearch kbZNotKeyword3 kbFoxPro200DOS kbFoxPro250DOS kbFoxPro250aDOS kbFoxPro250bDOS kbFoxPro260DOS kbFoxPro260 kbFoxPro250 kbFoxPro250a kbFoxPro250b kbFoxPro260a kbVFP300
Version           : MS-DOS:2.0,2.5,2.5a,2.5b,2.6; WINDOWS:2.5,2.5a,2.5b,2.6,2.6a,3.0

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