For an SWT Application window you can set the style you want when you create a shell. Create a shell like the following:
Shell shell = new Shell(SWT.TITLE | SWT.RESIZE);
This creates a title bar and allows the shell to be resized. It has no min, max or close buttons.
check out http://www.eclipse.org/documentation/ht ... Shell.html
for other stuff on Shell.
If you use SWT.MIN, SWT.MAX, or SWT.CLOSE, the close button will appear.
I don't know how to disable it for JFace.
http://www.eclipse.org/documentation/ht ... index.html
For all of Eclipse's API docs