/// <summary>
/// to set the hook function
/// </summary>
/// <returns></returns>
public int SetHook()
{
//delegate?
hProc = new Win32HookAPI.HookProc(MouseHookProc);
//set the hook function as hProc，即钩子函数的地址指针
hHook = Win32HookAPI.SetWindowsHookEx(idHookType, hProc, IntPtr.Zero, 0);
return(hHook);
}
/// <summary>
/// Hook function to minitor mouse action
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
//将数据从非托管内存块封送到新分配的指定类型的托管对象
Win32HookAPI.MouseHookStruct MyMouseHookStruct =
(Win32HookAPI.MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(Win32HookAPI.MouseHookStruct));
if (nCode < 0)
{
return(Win32HookAPI.CallNextHookEx(hHook, nCode, wParam, lParam));
}
else
{
this.Point = new Point(MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y);
return(Win32HookAPI.CallNextHookEx(hHook, nCode, wParam, lParam));
}
}
/// <summary>
/// uninstall hook function
/// </summary>
public void UnHook()
{
Win32HookAPI.UnhookWindowsHookEx(hHook);
}