Access Violation When You Use an Alias to Open a CD on a 64-Bit-Based Computer (325336)


The information in this article applies to:

  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
  • Microsoft Windows XP 64-Bit Edition SP1
This article was previously published under Q325336

SYMPTOMS

An access violation error message may occur when you open a CD by using an alias like the following alias on a 64-bit-based computer:

mciSendStringW(L"open cdaudio alias cd", NULL, 0,0);

CAUSE

Winmm.dll uses the size of a DWORD_PTR data type to calculate an offset into a structure that it is populating. This creates an address that is not valid. The address is not valid because a particular structure member calculates the wrong offset because a DWORD_PTR is 8 bytes on 64-bit-based computers.

WORKAROUND

To work around this problem, do not use an alias to open the CD.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MajorLast Reviewed:8/7/2002
Keywords:kbbug kbenv kberrmsg KB325336
©2002 Microsoft Corporation. All rights reserved.