BUG: _lread() Functions Incorrectly When No Floppy in Drive

ID: Q111587


The information in this article applies to:
  • Microsoft Windows Software Development Kit (SDK) 3.1


SYMPTOMS

Using the function _lread() to read a floppy disk when there is no disk in the floppy drive results in the System error-message box "Cannot Read from Drive..." with Retry and Cancel buttons. If the Cancel button is clicked, _lread() returns, indicating incorrectly that it read the number of bytes requested. Instead, it should return -1, indicating failure.


RESOLUTION

Before calling _lread(), call SetErrorMode() in your application to disable the default Windows Critical Error Handler so that the system error-message box will not be displayed. The _lread() function will correctly return -1, indicating failure.


STATUS

Microsoft has confirmed this to be a bug in Windows version 3.1. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: buglist3.10 3.10 int24

Keywords :
Version : WINDOWS:3.1
Platform : WINDOWS
Issue type :


Last Reviewed: November 4, 1999
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