Consider the following scenario. On a Windows Embedded CE 6.0-based device, you call the MultiByteToWideChar function in your code. You set the value of the fourth parameter of the MultiByteToWideChar function to -1. In this scenario, the MultiByteToWideChar function returns an unexpected value.

For example, you run the following code on the Windows Embedded CE 6.0-based device.

#define GB18030_CODEPAGE	(54936)
#define CHARSTR1		("abc")

len = MultiByteToWideChar(GB18030_CODEPAGE, 0, CHARSTR1, -1, NULL, 0);

You expect the MultiByteToWideChar function to return a value of 4 for the len variable. However, the MultiByteToWideChar function returns a value of 3 for the len variable.

Note This problem occurs only for the GB18030 code page.

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Software update information

A supported software update is now available from Microsoft as Windows CE 6.0 Platform Builder Monthly Update (August 2007). You can confirm this by scrolling to the "File information" section of this article. The package file name contains the product version, date, Knowledge Base article number, and processor type. The package file name format is:For example: Wincepb50-060503-kb917590-armv4i.msi is the ARMV4i Windows CE 5.0 Platform Builder fix that is documented in KB article 917590 and that is contained in the May 2006 monthly update. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

Prerequisites

This update is supported only if all previously issued updates for this product are also installed.

Restart requirement

After you apply this update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart the computer after you apply this update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this package has the file attributes (or later file attributes) that are listed in the following table.

File name	File size	Date	Time
Wincepb60-070830-kb941237-armv4i.msi	750,592	30-Aug-2007	22:44
Wincepb60-070830-kb941237-mipsii.msi	750,080	30-Aug-2007	22:44
Wincepb60-070830-kb941237-mipsii_fp.msi	750,080	30-Aug-2007	22:44
Wincepb60-070830-kb941237-mipsiv.msi	750,592	30-Aug-2007	22:44
Wincepb60-070830-kb941237-mipsiv_fp.msi	750,592	30-Aug-2007	22:44
Wincepb60-070830-kb941237-sh4.msi	749,568	30-Aug-2007	22:44
Wincepb60-070830-kb941237-x86.msi	749,568	30-Aug-2007	22:44

The English version of this update 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.

File name	File size	Date	Time	Path
Gb18030.lib	250,450	20-Aug-2007	21:22	public\common\oak\lib\armv4i\debug
Gb18030.lib	245,590	20-Aug-2007	21:22	public\common\oak\lib\armv4i\retail
Gb18030.lib	248,926	20-Aug-2007	21:22	public\common\oak\lib\mipsii\debug
Gb18030.lib	244,910	20-Aug-2007	21:22	public\common\oak\lib\mipsii\retail
Gb18030.lib	248,948	20-Aug-2007	21:22	public\common\oak\lib\mipsii_fp\debug
Gb18030.lib	244,928	20-Aug-2007	21:22	public\common\oak\lib\mipsii_fp\retail
Gb18030.lib	249,494	20-Aug-2007	21:22	public\common\oak\lib\mipsiv\debug
Gb18030.lib	245,638	20-Aug-2007	21:22	public\common\oak\lib\mipsiv\retail
Gb18030.lib	249,516	20-Aug-2007	21:22	public\common\oak\lib\mipsiv_fp\debug
Gb18030.lib	245,656	20-Aug-2007	21:22	public\common\oak\lib\mipsiv_fp\retail
Gb18030.lib	245,508	20-Aug-2007	21:22	public\common\oak\lib\sh4\debug
Gb18030.lib	242,736	20-Aug-2007	21:22	public\common\oak\lib\sh4\retail
Gb18030.lib	246,530	20-Aug-2007	21:22	public\common\oak\lib\x86\debug
Gb18030.lib	244,628	20-Aug-2007	21:22	public\common\oak\lib\x86\retail

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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For more information about the MultiByteToWideChar function, visit the following Microsoft Developer Network (MSDN) Web site: For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

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