ComboBox重绘制问题

Question

我我我我我我我我我我我我                         分分分分分分分分分分分分分
      我我    我我               分分分分分分分分           分分分        
我我我我我我我我我我我我              分分                 分分      
我    我我    我我    我              分分                分             
我    我我    我我    我              分分          分分分分分分分分分分分
我我我我我我我我我我我我              分分          分分              分分
          我我                        分分          分分     分       分分
        我我                          分分          分分     分分     分分
我我我我我我我我我我我我              分分          分分     分分     分分
   我           我                    分分          分分     分分     分分
    我         我                     分分          分分     分分     分分
      我     我                       分分          分分     分分     分分
       我  我                     分分分分          分分     分分     分分
        我我                         分分           分     分分   分    分
        我我                                           分分       分     
      我   我                                        分分           分分
   我我     我我                                   分分               分分   
我我           我我                             分分分                    分

Answer 1

你可以先调用User32Dll.GetDlgItem，获得该combobox的handler，然后创建一个nativeWindow,然后将combobox的handler赋予它，以便拦截combobox下拉菜单弹出时的句柄。例程如下：AssignHandle(User32Dll.GetDlgItem(mctlComboBox.Handle, 1001))最后用WndProc重绘整个nativeWindow，包括文字，鼠标选取时的背景色等。