public struct RECT{public int Left;public int Top;public int Right;public int Bottom;public RECT(Int32 left, Int32 top, Int32 right, Int32 bottom){Left = left;Top = top;Right = right;Bottom = bottom;}}/// <summary>/// 用来限制鼠标移动范围/// </summary>class LimitMouse{RECT rect;[DllImport("user32.dll")]static extern bool ClipCursor(IntPtr lpRect);[System.Runtime.InteropServices.DllImport("User32.dll")]static extern bool ClipCursor(ref RECT lpRect);public LimitMouse(int left,int top,int right,int bottom){rect = new RECT(left,top,right,bottom);ClipCursor(ref rect);}public LimitMouse(){ClipCursor(IntPtr.Zero);}}