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The RichEdit Control Undo Information May Be Lost When the Control Retrieves TextArticle ID: 812943 - View products that this article applies to. On This PageSYMPTOMSWhen you are running a program that uses the RichEdit control, the Undo feature may not work correctly. CAUSE Whether the Undo feature works depends on how the control is written. If you are
developing a program, note that the RichEdit control's Undo information is deleted
when an EM_STREAMIN or an EM_STREAMOUT window message is sent to the control with
the SF_TEXT flag if wParam does not contain the SFF_SELECTION flag. RESOLUTIONService pack informationTo resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:322389
(http://support.microsoft.com/kb/322389/EN-US/
)
How to obtain the latest Windows XP service packHotfix informationWindows XPA supported hotfix is 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 software update that contains this hotfix.If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix. Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: http://support.microsoft.com/contactus/?ws=support Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of
this fix 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.
(http://support.microsoft.com/contactus/?ws=support)
Date Time Version Size File name ------------------------------------------------------- 16-Jan-2003 11:23 5.30.23.1213 403,456 Riched20.dll Windows 2000Service Pack InformationTo resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:260910
(http://support.microsoft.com/kb/260910/EN-US/
)
How to Obtain the Latest Windows 2000 Service Pack
Hotfix InformationA supported hotfix is 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 software update that contains this hotfix.If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix. Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: http://support.microsoft.com/contactus/?ws=support Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of
this fix 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.
(http://support.microsoft.com/contactus/?ws=support)
Date Time Version Size File name ------------------------------------------------------- 28-Jan-2003 09:21 5.30.23.1213 412,432 Riched20.dll STATUSMicrosoft
has confirmed that this is a problem in the Microsoft products that are listed
at the beginning of this article.
Windows 2000This problem was first corrected in Microsoft Windows 2000 Service Pack 4.Windows XPThis problem was first corrected in Microsoft Windows XP Service Pack 2.MORE INFORMATIONThe problem that is described in this article may occur in a Microsoft Visual Basic .NET program if it
uses the Microsoft .NET Framework when the program tries to obtain the RichEdit control's text by using
the RichTextBox.Text property. PropertiesArticle ID: 812943 - Last Review: February 21, 2007 - Revision: 2.6 APPLIES TO
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