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Q103636: BUG: EV_RLSDS Event Does Not Indicate Current RLSD State

Article: Q103636
Product(s): Microsoft Windows Software Development Kit
Version(s): WINDOWS:3.1
Operating System(s): 
Keyword(s): 
Last Modified: 07-NOV-1999

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The information in this article applies to:

- Microsoft Windows Software Development Kit (SDK) 3.1 
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SUMMARY
=======

The EV_RLSDS communications event is documented as indicating the current state
of the RLSD (receive-line-signal-detect or carrier detect). However, this event
is never set.

SYMPTOMS
========

If SetCommEventMask() is used to enable the EV_RLSDS event, when
GetCommEventMask() is called, the EV_RLSDS bit will always be 0 (zero).

RESOLUTION
==========

To get the absolute state of RLSD, use the MSRshadow. For more information,
please see the following article in the Microsoft Knowledge Base:

  Q101417 Accessing the Modem Status Register (MSR) in Windows

STATUS
======

This will not be fixed in the Windows 3.1 COMM.DRV.

Additional query words: buglist3.10 3.10

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Keywords          :  
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310
Version           : WINDOWS:3.1

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