Thursday, 7 November 2013

Register comdlg32.ocx on x64 Win7

Today when I run an old tool on my x64 Windows 7, following error message is displayed:
Component ‘COMDLG32.OCX’ or one of its dependencies is not correctly registered: a file is missing or invalid.
comdlg32.ocx missing error
Here is how to resolve comdlg32.ocx missing error.
  1. Download comdlg32.zip and extract comdlg32.ocx from zip file
  2. Move comdlg32.ocx to c:\Windows\system32 folder. For 64bit Vista/Win7, move comdlg32.ocx to c:\Windows\SysWOW64
  3. 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.
  4. Once comdlg32 is registered successfully, following message will prompt, DllRegisterServer in C:\WINDOWS\System32\comdlg32.ocx succeeded.
  5. Now launch the application again you should not see file missing error.
Update: Important note if you use Windows 7: registering comdlg32.ocx 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


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