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The SetProxy method sets the proxy server for an HTTP request. When you create an application that uses the WinHttpRequest object, if you call the Open method before you call the SetProxy method, your application may leak two event handles every time that the application makes an HTTP request.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name ------------------------------------------------------- 05-Mar-2004 22:19 5.1.2600.1349 313,344 Winhttp.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
To verify that your application has a handle leak, monitor the Handle count in Microsoft Windows Task Manager. In Task Manager, verify that the application is leaking two handles every time that your application makes a new request. Also, verify that the handles are not released for a long time.