INFO: How to Restart Windows from Within FoxPro

ID: Q110254

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

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 FxprgFoxtools
Version : WINDOWS:2.5,2.5a,2.5b,3.0
Platform : WINDOWS
Issue type : kbinfo