rectangle

I am making a game, And I want to be able to draw a level in photoshop. And the game to read it. For this, I need a way to determine what are rectangles in a picture. For example, I have this kind of picture: And I want the program to realize what is a rectangle, What it's size and position...

private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { Pen pen = new Pen(ForeColor); if (m_DrawWave) { sbpMainPanel.Text = "Drawing .WAV file..."; wave.Draw(e, pen)...