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Asked: 2026-06-02T17:21:59+00:00

I’m developing a registered COM type library. When I build it, Visual Studio automatically

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I’m developing a registered COM type library. When I build it, Visual Studio automatically registers the library. I can view the type library in OleView.

I have two branches of this library, in separate directories, which is causing the problem: the HELPDIR is pointing at the wrong branch. My registry looks like this:

[HKEY_CLASSES_ROOT\TypeLib\{6C964648-D0B3-4c8a-B7D5-53D176CBCC68}]

[HKEY_CLASSES_ROOT\TypeLib\{6C964648-D0B3-4c8a-B7D5-53D176CBCC68}\1.0]
@="My Type Library"

[HKEY_CLASSES_ROOT\TypeLib\{6C964648-D0B3-4c8a-B7D5-53D176CBCC68}\1.0\0]

[HKEY_CLASSES_ROOT\TypeLib\{6C964648-D0B3-4c8a-B7D5-53D176CBCC68}\1.0\0\win32]
@="c:\\path\\right_dir\\mylib.dll"

[HKEY_CLASSES_ROOT\TypeLib\{6C964648-D0B3-4c8a-B7D5-53D176CBCC68}\1.0\FLAGS]
@="0"

[HKEY_CLASSES_ROOT\TypeLib\{6C964648-D0B3-4c8a-B7D5-53D176CBCC68}\1.0\HELPDIR]
@="c:\\path\\wrong_dir"

How do I get Visual Studio to correct the HELPDIR path when I build and register my library?

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1 Answer

  1. Editorial Team

    I used regsvr32 to unregister and then re-register the type library. When I unregistered, the registry keys were removed. Then when I registered again the correct values were added.

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