除了使用hook外，下面的代码也能够在全局捕捉鼠标：(csdn)-Windows开发-.NET教程-

 dy_2000_abc(芝麻开门)    
public class Form1 : System.Windows.Forms.Form,IMessageFilter
    {
        private System.Windows.Forms.Button button1;
        static void Main()
        {
       Application.Run(new Form1());
        }
        private void Form1_Load(object sender, System.EventArgs e)
        {
        Application.AddMessageFilter(this);
        }
        public bool PreFilterMessage(ref Message msg)
        {
       if (msg.Msg==0x205)
       {
           this.button1.Visible=true;
           return true;
       }
       else
           if (msg.Msg==0x201)
       {
       this.button1.Visible=false;
           return true;