Microsoft KB Archive/137249

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{| The information in this article applies to: Microsoft Win32 Application Programming Interface (API) included with: - Microsoft Windows NT version 3.51 - Microsoft Windows 95 version 4.0 - Microsoft Win32s version 1.3
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SYMPTOMS
If you are using the EM_CHARFROMPOS and EM_POSFROMCHAR messages with a RichEdit control as outlined in the Win32 SDK documentation, and they are not working, it is likely that your application is using incorrect values for EM_CHARFROMPOS and EM_POSFROMCHAR.

CAUSE
The definitions for EM_CHARFROMPOS and EM_POSFROMCHAR in Richedit.h are different from the definitions in Winuser.h.

RESOLUTION
The programmer needs to use the definitions from Winuser.h as these work correctly. Include Winuser.h before Richedit.h. If these messages still don't work, the message values should be hard-coded to those from Winuser.h.

STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.
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Last reviewed: September 29, 1995

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