DOCUMENT:Q112388  05-NOV-1999  [win16sdk]
TITLE   :GETBASEIRQ EscapeCommFunction()
PRODUCT :Microsoft Windows Software Development Kit
PROD/VER:WINDOWS:3.1
OPER/SYS:
KEYWORDS:kb16bitonly

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The information in this article applies to:

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

By calling EscapeCommFunction() with GETBASEIRQ as the nFunction parameter, an
application can determine the base I/O port address and IRQ used for a specific
communications port.

MORE INFORMATION
================

Although GETBASEIRQ is not documented in the Windows 3.1 SDK manuals, it is
listed in the WINDOWS.H header file, and will continue to be supported in future
versions of 16-bit Windows.

When calling EscapeCommFunction() with GETBASEIRQ, the value returned is a LONG.
The HIWORD of the return value is the IRQ and the LOWORD is the base I/O address
of the communications port.

Please note that this function call does not indicate whether a UART exists at
the port; it only returns the I/O base and IRQ that COMM.DRV would use for that
port.

Additional query words: 3.10

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Keywords          : kb16bitonly 
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310
Version           : WINDOWS:3.1

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