Microsoft KB Archive/940541

= FIX: The private bytes of the application continuously increase when an application calls the WlanGetAvailableNetworkList function and the WlanFreeMemory function on a Windows XP Service Pack 2-based computer =

Article ID: 940541

Article Last Modified on 8/29/2007

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APPLIES TO


 * Microsoft Windows XP Service Pack 2

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SYMPTOMS
Consider the following scenario. On a Microsoft Windows XP Service Pack 2 (SP2)-based computer, you apply the update that is described in Microsoft Knowledge Base article 918997. Additionally, you have an application that calls the WlanGetAvailableNetworkList function and the WlanFreeMemory function several times. In this scenario, the private bytes of the application continuously increase.



CAUSE
This problem occurs because the WlanFreeMemory function does not free all the memory that is associated with the WlanGetAvailableNetworkList function.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
You must have Windows XP SP2 installed to apply this hotfix.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
The WlanGetAvailableNetworkList function allocates the memory for the returned interfaces. The caller of the WlanGetAvailableNetworkList function is responsible for freeing the memory by using the WlanFreeMemory function.

For more information about the WlanGetAvailableNetworkList function, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/ms706749.aspx

For more information about the WlanFreeMemory function, visit the following MSDN Web site:

http://msdn2.microsoft.com/en-us/library/ms706722.aspx

For more information about the update that is described in Microsoft Knowledge Base article 918997, click the following article number to view the article in the Microsoft Knowledge Base:

918997 Developers cannot create wireless client programs that manage wireless profiles and connections over the Wireless Zero Configuration service in Microsoft Windows XP Service Pack 2

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional query words: Wlanapi Platform SDK

Keywords: kbexpertiseadvanced kbfix kbpubtypekc kbqfe kbhotfixserver KB940541

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