* the parent of the new text field
* @return the new text field
*/
private CCombo createCombo(Composite parent) {
CCombo combo= new CCombo(parent, SWT.BORDER);
combo.addModifyListener(this);
GridData data = new GridData();
data.horizontalSpan = 3;
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
data.verticalAlignment = GridData.CENTER;