BUG: RUN Command Hangs Form with WindowType=1 and Desktop=.T.

ID: Q190545

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a

SYMPTOMS

You display a form with Desktop = .T. and WindowType = 1. The form issues a RUN command that opens an MS-DOS box. When the MS-DOS box closes, the form appears hung and will not accept keyboard or mouse input.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

Run the following code from a program (.prg) file. In order to demonstrate the behavior, you need to run it in such a way that the Command window is the only window open when the program is started. You can do this by issuing the code DO <Filename.prg> in the Command window, where the filename is the name of the program file into which you have saved the code below. The program depends on the existence of a file called Autoexec.bat in your "C:\" directory. You can create a dummy file there if this file does not exist, or you could have the program copy a different file if you wish.


      PUBLIC oform1
      oform1=CREATEOBJECT("form1")
      oform1.SHOW
      RETURN

      DEFINE CLASS form1 AS FORM
         TOP = 0
         LEFT = 0
         HEIGHT = 206
         WIDTH = 231
         DESKTOP = .T.
         CAPTION = "Form1"
         WINDOWTYPE = 1
         NAME = "Form1"

      ADD OBJECT command1 AS COMMANDBUTTON WITH ;
         TOP = 120, ;
         LEFT = 72, ;
         HEIGHT = 27, ;
         WIDTH = 84, ;
         CAPTION = "Run XCopy", ;
         NAME = "Command1"

         PROCEDURE command1.CLICK
            RUN /N xcopy c:\autoexec.bat c:\autoexec.bak
         ENDPROC

      ENDDEFINE

Click the "Run XCopy" button.
The MS-DOS box appears and disappears, and the form becomes deselected. The form cannot get the focus and will not receive keyboard or mouse input. If you click on the close box in the Visual FoxPro desktop, you will receive a "Cannot quit FoxPro" message. Once this has occurred, the form will be accessible once again. This does not happen with Desktop = .F. or with WindowType = 0 and a READ EVENTS.

Additional query words: kbVFp500abug kbOOP


 
Version           : WINDOWS:5.0,5.0a
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbpending