Pls i'm having an issue here. I embedded an OleClientSite in my application with a tree widget. I connected the OleClientSite and the tree widget with a menu event. While the OleClientSite could be displayed the tree widget could not. The code snippet is shown below. Pls anyone with experience could help me thanks.

Menu bar = new Menu(shell, SWT.BAR);
shell.setMenuBar(bar);
shell.setLayout(new FillLayout());
shell.setText("Testing";
MenuItem fileItem1 = new MenuItem(bar, SWT.CASCADE);
fileItem1.setText("&File";
Menu openHeader = new Menu (fileItem1);
fileItem1.setMenu(openHeader);
MenuItem openFile = new MenuItem(openHeader, SWT.CASCADE);
openFile.setText("Open Document";
openFile.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
tree = new Tree (shell, SWT.BORDER);
TreeItem keyBloc = new TreeItem (tree, 0);
keyBloc.setText ("Testing";
}
});
MenuItem documentsMenu = new MenuItem(bar, SWT.CASCADE);
documentsMenu.setText("&Documents";
Menu documentsHeader = new Menu(documentsMenu);
documentsMenu.setMenu(documentsHeader);
MenuItem createDocuments = new MenuItem (documentsHeader, SWT.CASCADE);
createDocuments.setText("Create Document(s)";
createDocuments.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
clientSite = new OleClientSite(frame, SWT.NONE, "Word.Document";
clientSite.doVerb(OLE.OLEIVERB_INPLACEACTIVATE);
}
});