Api代码收集

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    #region 隐藏系统滚动条
    protected override void WndProc(ref System.Windows.Forms.Message m)
    {
      ShowScrollBar(this.Handle, 3, false);//0:horizontal,1:vertical,3:both
      base.WndProc(ref m);
    }

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool ShowScrollBar(IntPtr hWnd, int wBar, bool bShow);
    #endregion

    #region 得到光标在屏幕上的位置
   [DllImport("user32")]
    public static extern bool GetCaretPos(out Point lpPoint);
    [DllImport("user32.dll")]
    private static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll")]
    private static extern IntPtr GetFocus();
    [DllImport("user32.dll")]
    private static extern IntPtr AttachThreadInput(IntPtr idAttach, IntPtr idAttachTo, int fAttach);
    [DllImport("user32.dll")]
    private static extern IntPtr GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);
    [DllImport("kernel32.dll")]
    private static extern IntPtr GetCurrentThreadId();
    [DllImport("user32.dll")]
    private static extern void ClientToScreen(IntPtr hWnd, ref Point p);

    private Point CaretPos()
    {
        IntPtr ptr = GetForegroundWindow();
        Point p = new Point();

        //得到Caret在屏幕上的位置   
      if (ptr.ToInt32() != 0)
        {
            IntPtr targetThreadID = GetWindowThreadProcessId(ptr, IntPtr.Zero);
            IntPtr localThreadID = GetCurrentThreadId();

            if (localThreadID != targetThreadID)
            {
                AttachThreadInput(localThreadID, targetThreadID, 1);
                ptr = GetFocus();
                if (ptr.ToInt32() != 0)
                {
                    GetCaretPos(out   p);
                    ClientToScreen(ptr, ref   p);
                }
                AttachThreadInput(localThreadID, targetThreadID, 0);
            }
        }
        return p;
    }
    #endregion

//如何在全屏时notifyIcon依然能够弹出ShowBalloonTip
[DllImport("user32.dll",EntryPoint = "GetForegroundWindow", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetForegroundWindow(); //获得本窗体的句柄
[DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
public static extern bool SetForegroundWindow(IntPtr hWnd);//设置此窗体为活动窗体

if (this.Handle != GetForegroundWindow())
{
    SetForegroundWindow(this.Handle);
    notifyIcon1.ShowBalloonTip(1500,"注意注意","XXXXXXX！",ToolTipIcon.Warning);
}