说明：  平坦按钮和平坦combobox,按钮实现鼠标滑过凸起效果，摘自cjlibrary,平坦combobox自己编写，重画该控件以实现平坦效果，可以应用在listctrl上实现变异控件，里面包含一个combolistctrl的实现，由于已经存在类似代码不让上传，就搁在这里
(flat and smooth combobox button, mouse button sculpting uplift effect, From cjlibrary flat combobox their preparation, the re-drawing of controls to achieve the smooth effects, listctrl can be applied to achieve the control variability, combolistctrl one of which contains the achievement, because they have similar codes exist not to upload, here on the dormant)