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Q110254: INFO: How to Restart Windows from Within FoxPro

Article: Q110254
Product(s): Microsoft FoxPro
Version(s): WINDOWS:2.5,2.5a,2.5b,3.0
Operating System(s): 
Keyword(s): kbcode
Last Modified: 18-DEC-1999

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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 
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SUMMARY
=======

You can restart Windows from inside a FoxPro for Windows application by using
the Windows API function ExitWindows(). With this function, you can restart
Windows without rebooting the entire system, as explained below.

This code does not work under Windows 95, Windows 98 or Windows NT 4.0 because
there is no ExitWindows entry point in USER32.EXE on Win32 Operating Systems.


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

By using FOXTOOLS.FLL and the Windows API function ExitWindows(), you can
restart Windows. The following code illustrates this concept.

NOTE: While it is possible to restart Windows from within a FoxPro for Windows
program by making use of the Windows API function ExitWindows(), FoxPro may not
do a complete cleanup and may leave *.TMP files in your SET TEMP= subdirectory.

     *** Begin Code ***
     * WARNING: Make sure all work is saved before running code

     SET LIBRARY TO SYS(2004)+"FOXTOOLS.FLL" ADDITIVE
     do_over=REGFN("ExitWindows","II","I")
     title="Program Message"
     msg="Would you like to restart Windows now?"
     choice=MSGBOX(msg,title,36)
     IF choice=6    && button 'Yes' was chosen
        =CALLFN(do_over,66,0)
     ELSE
        WAIT WINDOW "You have chosen not to restart Windows" TIMEOUT 2
     ENDIF
     *** End Code ***

The ExitWindows() function requires two numeric values to be passed in and
returns a single integer. The significance of the first integer (66) is that it
is the decimal equivalent of 0x42 hexadecimal or EW_RESTARTWINDOWS, which is a
low-order word in the C++ language. The second integer is reserved and is always
zero. When the ExitWindows() function is called, it sends a message to all
active applications that a request has been made to restart Windows. If all
applications "agree" to be terminated, the WM_ENDSESSION message will be sent to
all applications before Windows is restarted.

REFERENCES
==========

Visual C++ Help file


Additional query words: VFoxWin FoxWin 2.50 quit restart exit 3.00 2.50a

======================================================================
Keywords          : kbcode 
Technology        : kbVFPsearch kbAudDeveloper kbFoxproSearch kbFoxPro250 kbFoxPro250a kbFoxPro250b kbVFP300
Version           : WINDOWS:2.5,2.5a,2.5b,3.0
Issue type        : kbinfo

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