◆dateTimePicker控件如何进行类似combobox的扁平效果◆
dateTimePicker想实现combobox的扁平效果
即：当combobox的FlatStyle属性设置成Flat时的扁平效果

[解决办法]
Look this
http://www.codeproject.com/script/Articles/ViewDownloads.aspx?aid=6664