How to Register Comdlg OCX

1. Open a Command Prompt. Click on 'Start' and then 'Run' for Windows XP or an earlier version of the operating system. Enter the text 'cmd' (no quotes) and press 'Enter.'Click on the Windows logo and point to 'All Programs' for Windows Vista or Windows 7. Click on 'Accessories' and then right-click on 'Command Prompt.' Select 'Run as Administrator.'
2. Enter the command 'regsvr32 %SystemRoot%\comdlg32.ocx,' where '%SystemRoot%' is the full path to your Windows system folder ('C:\Windows\System32' is a common system folder for Vista computers, for instance).
3. Wait for the message that the registration succeeded. Type 'exit' and press 'Enter' to close the Command Prompt. Restart Windows and ensure that the system changes are complete.