困扰了2天的问题，终于解决了。VB6的MSComCtl.ocx在32位Win7显示对象库未注册

 解决方案在这里，中文的资料真的挺垃圾的。

https://www.fmsinc.com/MicrosoftAccess/controls/mscomctl/index.htm

https://social.msdn.microsoft.com/Forums/vstudio/en-US/193b5c10-59c4-4d9c-9aff-d036086c741f/cannot-register-mscomctlocx-in-windows-7-32-bit

https://support.microsoft.com/zh-cn/help/2597986/ms12-060-description-of-the-security-update-for-office-2010-august-14

32 Bit Windows

1. Unregister the new OCX file. Open an instance of the Windows Command Prompt, paste the following command, and press <Enter>:
   Regsvr32.exe /u C:\Windows\System32\MSCOMCTL.OCX
   
2. Make a backup of the OCX file C:\Windows\System32\MSCOMCTL.OCX to C:\Windows\System32\MSCOMCTL.bak
3. Copy a legacy version of the MSCOMCTL.OCX file to your C:\Windows\System32 folder. For your convenience, a zipped copy from 2011 is here.
4. Register this legacy OCX file with the following command:
   Regsvr32.exe C:\Windows\System32\MSCOMCTL.OCX
5. Unregister this legacy version of the OCX file:
   Regsvr32.exe /u C:\Windows\System32\MSCOMCTL.OCX
6. Delete the legacy OCX file: C:\Windows\System32\MSCOMCTL.OCX
7. Rename the new OCX file we renamed in step 2, back to its original name:
   C:\Windows\System32\MSCOMCTL.bak to C:\Windows\System32\MSCOMCTL.OCX
8. Re-register the new version of the OCX file. Paste the following command and press <Enter>:
   Regsvr32.exe C:\Windows\System32\MSCOMCTL.OCX
9. Reboot the computer.
10. Open Microsoft Access and then retest the control. It should be working at this point.

标签：MSComCtl,MSCOMCTL,Windows,32,System32,未注册,OCX,legacy,file
来源： https://www.cnblogs.com/zitjubiz/p/VB6_IDE_Object_library_not_registered_mscomctl.html