Private Sub Command1_Click() If Not Check(Combo1.Text)Then MsgBox("输入错误") Exit Sub End If For k=0 To Combo1.ListCount-1 If Combo1.Text: Combo1.List(k) Then MsgBox("添加项目失败") Exit Sub End If Next k Combo1.Addltem Combo1.Text MsgBox("添加项目成功") End Sub Private Function Check(ch As String) As Boolean n=Len(ch) For k=1 To n c $=UCase(Mid(ch,k,1)) If C<"A" Or C>"Z"Then Check=False Exit Function End If Next k Check=True End Function 程序运行时,如果在组合框的编辑区中输入"Java",则单击命令按钮后产生的结果是______。