Based on my understanding, the main part of your problem is how to find the positions of a control in picture box. BinaryCoder has already shown the key problem. The code snippet below explains the idea:

Panel panel;

PictureBox picBox;

Button bt;

private void Form1_Load(object sender, EventArgs e)

{

panel = new Panel();

panel.Location = new Point(20, 20);

panel.Size = new Size(200, 200);

panel.BorderStyle = BorderStyle.FixedSingle;

this.Controls.Add(panel);

picBox = new PictureBox();

picBox.Location = new Point(5, 5);

picBox.Size = new Size(100, 100);

picBox.BorderStyle = BorderStyle.Fixed3D;

this.panel.Controls.Add(picBox);

bt = new Button();

bt.Name = "bt";

bt.Location = new Point(2, 2);

bt.Text = bt.Name;

bt.Size = new Size(30, 30);

this.picBox.Controls.Add(bt);

bt.Click += new EventHandler(bt_Click);

}

private void bt_Click(object sender, EventArgs e)

{

Point posInScreen = bt.PointToScreen(Point.Empty);

string posInfo = "";

posInfo += "In PictureBox:" +

GetLocation(this.picBox.PointToClient(posInScreen))

+ "\r\n";

posInfo += "In Panel:" +

GetLocation(this.panel.PointToClient(posInScreen))

+ "\r\n";

posInfo += "In form:" +

GetLocation(this.PointToClient(posInScreen))

+ "\r\n";

MessageBox.Show(posInfo);

}

private string GetLocation(Point p)

{

return p.X + ":" + p.Y;

}

Let me know if this helps.

Best regards,

Aland Li

Button b = your_button;
Point pt = this.PointToClient(b.PointToScreen(Point.Empty));

Could you please illustrate more?

What will be the relationship for thetheleft and top ofButton b, PictureBox pic, Panel pnl and this?

Based on my understanding, the main part of your problem is how to find the positions of a control in picture box. BinaryCoder has already shown the key problem. The code snippet below explains the idea:

Panel panel;

PictureBox picBox;

Button bt;

private void Form1_Load(object sender, EventArgs e)

{

panel = new Panel();

panel.Location = new Point(20, 20);

panel.Size = new Size(200, 200);

panel.BorderStyle = BorderStyle.FixedSingle;

this.Controls.Add(panel);

picBox = new PictureBox();

picBox.Location = new Point(5, 5);

picBox.Size = new Size(100, 100);

picBox.BorderStyle = BorderStyle.Fixed3D;

this.panel.Controls.Add(picBox);

bt = new Button();

bt.Name = "bt";

bt.Location = new Point(2, 2);

bt.Text = bt.Name;

bt.Size = new Size(30, 30);

this.picBox.Controls.Add(bt);

bt.Click += new EventHandler(bt_Click);

}

private void bt_Click(object sender, EventArgs e)

{

Point posInScreen = bt.PointToScreen(Point.Empty);

string posInfo = "";

posInfo += "In PictureBox:" +

GetLocation(this.picBox.PointToClient(posInScreen))

+ "\r\n";

posInfo += "In Panel:" +

GetLocation(this.panel.PointToClient(posInScreen))

+ "\r\n";

posInfo += "In form:" +

GetLocation(this.PointToClient(posInScreen))

+ "\r\n";

MessageBox.Show(posInfo);

}

private string GetLocation(Point p)

{

return p.X + ":" + p.Y;

}

Let me know if this helps.

Best regards,

Aland Li