|A frustrating occurrence for Visual Basic 5 users is when suddenly, for
no apparent reason Visual Basic 5 refuses to load in COMDLG32.OCX, COMCTL32.OCX, or
Instead the error message 'Could Not Be Loaded' is given despite such
files existing in the system directory and VB 5 knowing the correct names of the files.
This means that you are not able to use the common dialog controls: toolbar, status bar,
image list, progress bar, tree view, list view, slider, etc. Therefore, the
updated article below is intended for VB 5 programmers who encounter this
problem. In addition, another article
kindly provided by Amy Carlstrom,
has been provided to offer an alternative solution.
Here's an important paragraph from Microsoft Knowledge Base article Q217017 (http://support.microsoft.com/support/kb/articles/q217/0/17.asp)
concerning the above error message: This error message occurs when you install a newer
version of an ActiveX control, uninstall it, and then install an older version of the same
ActiveX control. The registry key for the newer version of the ActiveX control remains in
the registry and Visual Basic 5.0 is now trying to use that registry key. This could
easily happen, for example, if you install a recent shareware program and later uninstall
it. The key point is that although the earlier version of the OCX is restored, the Windows
registry still points to the later version of the OCX and since it is no longer there, VB
5 is unable to load it.
To fix the problem, the Knowledge Base advises using RegClean, making the point: RegClean
will only be effective if Comctl32.ocx is deleted from the system before running RegClean.
Although not mentioned by the article, it appears that comdlg32.ocx and comct232.ocx
should also be temporarily deleted before running RegClean. For details on using RegClean,
see the general tools section of this Microsoft TechNet article.
Unfortunately, the RegClean utility itself can be downloaded from the Microsoft site
as stated in the TechNet article above, but instead can be found on many
FTP search engines, such as Lycos,
by searching on RegClean.exe.
Here are the specific steps to take to solve the problem:
1. Download RegClean from the Microsoft site.
2. Send the three com*32.ocx files to the Recycle bin.
3. Unzipped and run RegClean to repair the registry.
4. Restore the three com*32.ocx files from the Recycle bin.
5. Use Regsvr32.exe to register the three com*32.ocx files.
6. Test VB to confirm that things are working again.
7. Reinstall the Visual Basic 5 Service Pack 3 (good practice after you using
Reason: If you install a shareware program and then uninstall the
program, you run the risk of corrupting the registry for VB 5. This is because when you
install the program, it may replace an older OCX with a newer version, and when you
uninstall it, it will replace the newer OCX with the older version, but without
fixing the registry.