VB6 IDE cannot load MSCOMCTL.OCX after update KB 2687323

user_393613 0
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After windows update installed security update KB2687323, my VB6 project fails to load. Displayed error message is "'[project_vbp_path]/MSCOMCTL.OCX' could not be loaded--Continue Loading Project?". Note that the path in the messeage is the vbp file folder path instead of the control's registered path.

Details:

  1. MSCOMCTL.OCX is registered in the usual system32 folder.
  2. The executable produced by exactly the same project, an hour before the update runs fine and loads the updated MSCOMCTL.OCX (I have checked it with Process Explorer).

The security update description states that MSCOMCTL.OCX has a new fixed version. So I checked the project properties for "Upgrade ActiveX Controls" checkbox. I tried it both ways; checked and unchecked to no avail. VB6 IDE refused to load the upgraded OCX.

vb6
17 Answers

I had similar trouble, have a program running for last 10 years written in VB6, now client wanted to make some major modifications, and all my machines which are now windows 10; failed to open the project, it was always that nasty mscomctl.ocx error. I had done lot of things but could not solve the problem. Then I thought the easy way around, I downloaded the latest mscomctl (mscomctl.ocx Then opened a new project, added all the components like mscomctl, activx controls etc, saved it and opened this newly created project file in Notepad, then copied the exact details and replaced in the original project.... and bingo! The old project opened up normally without any fuss! I hope this experience will help someone.

user_36153180

In my case didn't work any solution above. Near to give up, removed any reference (using Arvo Bowen's fix.cmd file) and tried pasting mscomctl.ocx (version 6.1.97.86) in C:\Program Files (x86)\Microsoft Visual Studio\VB98 folder. It worked finally after more than 4 or 5 hours fighting for a solution.

user_64836630
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