When you install the Eclipse base platform, you don't get SWT support. SWT is the hammer compared to screw driver called "Swing".

You can use the SWT tutorial or dowload this Windows zip file

Then select file import from Eclipse.

Select "General", then "Existing Projects into workspace". Continue by clicking "Next >".

Select Archive file radio button. Enter the location you saved the above and click finish.

You have SWT! Amazing but true.

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If you need any other downloads here is the Spartan-like page: Eclipse 3.2 Downloads