Go to the Run item on the Start menum, and type:

regsvr32 <path & filename of dll or ocx>
 

or

1.Locate the file using windows explorer or My Computer. Alternatively search for the filename.

2.Hold down the shift key and right click on the file. Then click 'Open With...' from the menu.

3.An 'Open With' dialog box should appear. Click the button 'Other...'.

4.Navigate to your windows\system32 directory and select the file 'RegSvr32.exe'. Do a file search for it if you have trouble locating the exact folder. On Windows 2000 it is typically located in c:\WINNT\System32. Click Open to select the file. Then click OK on the 'Open With' dialog.

5.You should see a message indicating the file was successfully registered. If you see an error message, try restarting your computer and going through the above process again.