关于Winform控件调用插入点（光标）的用法

 // 导入处理光标的 Windows 32 位 API
        // 创建光标
        [DllImport("User32.dll")]
        private static extern bool GetCaretPos(ref  MyNativePOINT p);


        // 导入处理光标的 Windows 32 位 API
        // 创建光标
        [DllImport("User32.dll")]
        private static extern bool CreateCaret(IntPtr hWnd, int hBitmap, int nWidth, int nHeight);
        // 设置光标位置
        [DllImport("User32.dll")]
        private static extern bool SetCaretPos(int x, int y);
        // 删除光标
        [DllImport("User32.dll")]
        private static extern bool DestroyCaret();
        // 显示光标
        [DllImport("User32.dll")]
        private static extern bool ShowCaret(IntPtr hWnd);
        // 隐藏光标
        [DllImport("User32.dll")]
        private static extern bool HideCaret(IntPtr hWnd);