'将窗口名称装入combo中,并默认第一条 
    combo.list.add("form1"); 
    combo.list.add("form2"); 
    combo.setSelectIndex(0); 
     
    '点击按钮后 
    f = combo中用户选择的窗口名称 
    if f = "form1" then 
     form1.show; 
    elseif f = "form2" then 
     form2.show; 
    endif 
<END>