BUG: Opening a DSP or DSW File in Explorer Crashes Visual C++

• Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0

SYMPTOMS

Double-clicking or pressing the return key with a project file (.dsp) or a workspace file (.dsw) selected in Windows Explorer causes Visual C++ to crash with the following error:

The instruction at "0x50c2b90d" referenced memory at "0x00000000". The memory could not be "read".

CAUSE

This problem occurs when you have a macro file (.dsm) loaded in the Visual C++ integrated development environment.

RESOLUTION

When opening projects or workspaces from Windows Explorer, Dynamic Data Exchange (DDE) is used to open these files in a currently running instance of Visual C++. If Visual C++ is not running, the program will start if you double-click a .dsp or .dsw file. The presence of a macro file interferes with DDE, thereby causing this crash. Follow these steps to turn off this feature for the .dsp and .dsw file extensions:

1. Start Windows Explorer.



2. From the View menu, select Folder Options. (If you are using Windows 2000, then View is found under the Tools menu.)



3. Click the File Types tab.



4. Under Registered File Types, select Project File, and then click Edit. (In Windows 2000, click Advanced.)



5. Select Open with MSDEV from the Actions list, and then click Edit.



6. Clear the Use DDE checkbox and click OK.


For the .dsw file extension, repeat the above steps except in Step 4 select Project Workspace.

1. Follow the first six steps described above.



2. Select the Use DDE checkbox.



3. Type Open("%1") in the DDE Message edit box.



4. Type msdev in the Application edit box.



5. Type System in the Topic edit box.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

Steps to Reproduce Behavior

1. From the Tools menu, select Customize, then click the Add-ins and Macro Files tab and browse for an existing macro file (DSM).
   
   If a macro file does not exist, then create a new one and add a Visual Basic Script macro to the file. It is essential to have some text in the macro file.



2. Quit Visual C++.



3. Start Windows Explorer, and then double-click an existing DSP or DSW file.


An error will occur.

REFERENCES

For more information on Visual Basic Script macros, see the following topic in the MSDN Online Libraries:

http://msdn.microsoft.com/library/devprods/vs6/visualc/vcug/_asug_home_page.3a_.vbscript_macros.htm

Additional query words:

Keywords : kbservicepack kbAutomation kbVBScript kbVC kbVC600bug kbDSupport kbGrpDSTools
Version : WINDOWS:6.0
Platform : WINDOWS
Issue type : kbbug