.net中通用，效果非常好的，自动跟输入关联的下拉框控件，-auto dropdown control

修改的combobox控件，调用Win32Api，添加了鼠标在DropList下拉框部分时的MouseMove事件，添加鼠标所停留DropList下拉框item的索引值属性。-Modified combobox control, call Win32Api, add the MouseMove event mouse DropList dropdown part time, add mouse DropList dropdown item index value property to stay

多列Combox实现combobx下拉显示多列自定义控件-Combox achieve multi-column display multi-column custom dropdown combobx