Question

When I clicked on a control,

How to get cursor position relative to upper left corner of a (winforms) control ?

C#, VS 2005

PS:
I’m asking on context of tooltip “show” method which need that coordinates ..

Answer 1

This is my code to set tooltips on a composite control, might give you a clue (LED derivers from UserControl):

    public LED()
    {
        InitializeComponent();
        m_Image = global::AdvAdmittance.Controls.Properties.Resources.ledgray_small;
        m_ToolTip = new ToolTip();
        m_ToolTip.AutoPopDelay = 5000;
        m_ToolTip.InitialDelay = 1000;
        m_ToolTip.ReshowDelay = 500;
        m_ToolTip.ShowAlways = true;
        m_LedPictureBox.MouseHover += new EventHandler(m_LedPictureBox_MouseHover);
        m_LedPictureBox.MouseLeave += new EventHandler(m_LedPictureBox_MouseLeave);
        m_LedPictureBox.Click += new EventHandler(m_LedPictureBox_Click);
    }

    void m_LedPictureBox_MouseHover(object sender, EventArgs e)
    {
        if (m_ToolTipText != string.Empty)
        {
            Point toolTipPoint = this.Parent.PointToClient(Cursor.Position);
            toolTipPoint.Y -= 20;
            m_ToolTip.Show(m_ToolTipText, this.Parent, toolTipPoint);
        }
    }

    void m_LedPictureBox_MouseLeave(object sender, EventArgs e)
    {
        m_ToolTip.Hide(this.m_LedPictureBox);
    }