判断鼠标是否按下.
判断鼠标是否按下.

[解决办法]
mouse.mousedown()
[解决办法]
You may use Control.MouseButtons to detect mouse button status.

C# code

    public partial class Form1 : Form    {        Timer timer = new Timer();        public Form1()        {            InitializeComponent();            timer.Interval = 100;            timer.Start();            timer.Tick += delegate            {                string s = "";                switch (Control.MouseButtons)                {                    case MouseButtons.Left: s = "Left"; break;                    case MouseButtons.Middle: s = "Middle"; break;                    case MouseButtons.Right: s = "Right"; break;                }                this.Text = s;            };        }    }
[解决办法]
  if (MouseButtons == MouseButtons.Left)
               MessageBox.Show("mouse left click ");