Register comdlg32.ocx on x64 and 32 Windows 7 / vista / xp

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Today when I run an old tool on my x64 win7, following error message is displayed: Component ‘COMDLG32.OCX’ or one of its dependencies is not correctly registered: a file is missing or invalid.

Here is how to resolve comdlg32.ocx missing error.

1. Download comdlg32.zip and extract comdlg32.ocx from zip file
2. or download Download comdlg32.zip and save to Desktop.
3. Move comdlg32.ocx to c:\Windows\system32 folder. For 64bit Vista/Win7, move comdlg32.ocx to c:\Windows\SysWOW64
4. Open a command line window and run following command:
   regsvr32 c:\Windows\system32\comdlg32.ocx
   Note: a) On 64bit Vista/Win7, run this command instead:
   
   regsvr32 c:\Windows\SysWOW64\comdlg32.ocx
   b) For Vista/Win7 with UAC turn on, the above command needs to be run from elevated command prompt.
5. Once comdlg32 is registered successfully, following message will prompt, DllRegisterServer in C:\WINDOWS\System32\comdlg32.ocx succeeded.
6. Now launch the application again you should not see file missing error.

Update: Important note if you use WIN7: when registering comdlg32.ocx, it must be done as administrator, or regsvr32.exe will fail with error 0x8002801c.
To do this as administrator, Go to ‘All Programs -> Accessories -> Command Prompt’, right click on ‘Command Prompt’ icon, and click on ‘Run as administrator’ to start a command prompt, then run the regsvr32 command

 http://devonenote.com/2010/02/register-comdlg32-ocx-on-x64-win7/
http://www.sevenforums.com/crashes-debugging/59463-comdlg32-ocx.html