1. Click the Windows Start button and select 'Run.' Enter 'cmd' and press the 'OK' button to open the Windows command prompt.
2. Type 'cd <directory>' and press 'Enter.' Replace '<directory>' with the location of your ActiveX control you want to install. This points the Windows command prompt to the directory for your control.
3. Type 'regsvr <ActiveX Control>' into the command prompt and press 'Enter.' Replace '<ActiveX Control>' with the file name for the control. This installs and registers the control on your Windows 2003 machine.