DateTimePicker控件，我想替换下拉按钮的图标

Question

不知道有什么办法，另外需要用继承子类实现，不能另外自己写一个usercontrol

Answer 1

  private void Form2_Load(object sender, EventArgs e)
        {
            PictureBox _PictureBox = new PictureBox();
            _PictureBox.Height = dateTimePicker1.Height;
            _PictureBox.Width = 24;
            _PictureBox.Image = this.Icon.ToBitmap();
            _PictureBox.Click += new EventHandler(_PictureBox_Click);
            _PictureBox.Location = new Point(dateTimePicker1.Width - 24, 0);            dateTimePicker1.Controls.Add(_PictureBox);
        }        void _PictureBox_Click(object sender, EventArgs e)
        {
            Control _Control = (Control)sender;
            DateTimePicker _TimePicker = _Control.Parent as DateTimePicker;
            if (_TimePicker != null)
            {
                SendMessage(_TimePicker.Handle, 0x0104, 0x28, 0);               
            }
        }        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);
绘制PictureBox就可以了

Answer 2

二楼可以, 
"貌似不行"是意思,
是否缺少引用
using System.Runtime.InteropServices;