Microsoft KB Archive/103636

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BUG: EV_RLSDS Event Does Not Indicate Current RLSD State

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Q103636

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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

Keywords :

Issue type :

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310