c#限制鼠标移动范围

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1、1 一个鼠标类#region 一个鼠标类     2    /**//// 

2、3; 11        internal const byte SM_MOUSEWHEELPRESENT = 75; 12 13        internal struct POINTAPI 14        { 15            internal int x; 16            internal int y; 17        } 18 19        internal struct RECT 20        { 21            internal int left; 22          

3、  internal int top; 23            internal int right; 24            internal int bottom; 25        } 26 27        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "SwapMouseButton")] 28        internal extern static int SwapMouseButton(int bSwap); 29 30

4、        [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "ClipCursor")] 31        internal extern static int ClipCursor(ref   RECT lpRect); 32 33        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "GetCursorPos")] 34        internal

5、 extern static int GetCursorPos(ref   POINTAPI lpPoint); 35 36        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "ShowCursor")] 37        internal extern static bool ShowCursor(bool bShow); 38 39        [System.Runtime.InteropServices.DllImport("u

6、ser32.dll", EntryPoint = "EnableWindow")] 40        internal extern static int EnableWindow(int hwnd, int fEnable); 41 42        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "GetWindowRect")] 43        internal extern static int GetWindowRect(int hw

7、nd, ref   RECT lpRect); 44 45        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "SetCursorPos")] 46        internal extern static int SetCursorPos(int x, int y); 47 48        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "Ge

8、tSystemMetrics")] 49        internal extern static int GetSystemMetrics(int nIndex); 50 5