Eclipse plugin to automatically search for help on selected text

I am currently trying to create an Eclipse plugin where you select text from the editor, press the shortcut (in my case, it is alt + F1) and the Eclipse help search will open and automatically search for the selected text.

Now I have already created a Binding-> Command-> Handler and a text in a method that returns the selected text as a string and I am stuck on how to open an Eclipse help search and query for that specific string through my code.

I searched a bit and found ISearchEngine2 from org.eclipse.help.search that could help me do what I am trying to do, but since I'm new to Eclipse plugin development I really don't know how to implement it.

Can anyone help me with this?

Currently my code looks like this:

    public class Button1 extends AbstractHandler {

        public Button1() {}

            public String getCurrentSelection()
            {
            IEditorPart part =PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
            if (part instanceof ITextEditor)
            {
            final ITextEditor editor = (ITextEditor) part;
            ISelection sel = editor.getSelectionProvider().getSelection();
            if (sel instanceof TextSelection)
            {
                 ITextSelection textSel = (ITextSelection) sel;
                 return textSel.getText();
            }
            }
            return null;
            }

public void searchInHelp(String str){
...
}

        public Object execute(ExecutionEvent event) throws ExecutionException {
            IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);
            String str = getTextSelection();
            searchInHelp(str);

            return null;
        }
    }