Microsoft KB Archive/141677

= FIX: Insufficient Memory Errors Using OLE Controls =

Article ID: 141677

Article Last Modified on 3/24/2000

-

APPLIES TO


 * Microsoft Visual FoxPro 3.0 Standard Edition

-



This article was previously published under Q141677



SYMPTOMS
Under some circumstances, using OLE controls and then repeatedly running the form that contains the OLE controls may result in a loss of system resources.



STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was corrected in FoxPro 3.0b for Windows.



MORE INFORMATION
The following steps will replicate the resource leak in Windows 3.1 or in Windows NT. Before trying this example, you should save any information you have open in Visual FoxPro.

Steps to Reproduce Problem
The following steps require that two conditions be satisfied:


 * Microsoft Word 6.0 or later must be installed.
 * On the Tools under the Controls option, you have both the Outline and Microsoft Word Document controls installed.

  Create a new program file that holds the following code: FOR i = 1 TO 50000 Formstr = "TESTFRM" Loopstr = "#" + STR(i,3) + ": "

WAIT loopstr + "Modifying form" WINDOW NOWAIT MODIFY FORM (formstr) NOWAIT WAIT loopstr + "Modifying form" WINDOW TIMEOUT 2 RELEASE (formstr) CLEAR WINDOW CLOSE ALL *    WAIT loopstr + "Running form" WINDOW NOWAIT DO FORM (formstr) WAIT loopstr + "Running form" WINDOW TIMEOUT 2 RELEASE (formstr) CLEAR WINDOW CLOSE ALL *    WAIT loopstr + "Delaying 2 seconds..." WINDOW TIMEOUT 2 WAIT loopstr + ; "Memory handles in use = " + STR(VAL(SYS(1011)),4) WINDOW

TIMEOUT 2 ENDFOR   In the Command window, type: CREATE FORM TESTFRM   In the Init event of the form, place the following code: Public rval

rval=getobject("","word.basic") Thisform.olecontrol2.doverb(0) rval.insert("Hello") rval.insert("Hello1") rval.insert("Hello2") rval.insert("Hello3") rval.insert("Hello4")

Thisform.olecontrol1.additem("Line1") Thisform.olecontrol1.additem("Line2") Thisform.olecontrol1.additem("Line3") Thisform.olecontrol1.additem("Line4") Thisform.olecontrol1.additem("Line5")  Place an Outline control on the form. Do not change any default settings. Place a Word Document control on the form, and type some text in it. Run the code. On some versions of Win32s (Prior to version 1.25) Visual FoxPro will quit at around 870 iterations; on Windows NT it will quit at around 2,700 iterations.</li></ol>

Additional query words: VFoxWin buglist3.00 fixlist3.00b crash OLE control OLECONTROL

Keywords: kbbug kbfix KB141677

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.