FrameStyle Enumeration
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FrameStyle Enumeration


Specifies the frame style of the selected control.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public enum FrameStyle

Member nameDescription

A thin, dashed border.


A thick, solid border.

This enumeration is used by ControlPaint.DrawReversibleFrame.

DrawReversibleFrame is used when selecting objects or during drag-and-drop operations.

The following code example demonstrates using the FrameStyle enumeration. To run the example, paste the following code in a form called Form1 containing several controls.This example assumes the MouseDown, MouseMove, and MouseUp events are connected to the event-handler methods defined in the example.

  // The following three methods will draw a rectangle and allow 
  // the user to use the mouse to resize the rectangle.  If the 
  // rectangle intersects a control's client rectangle, the 
  // control's color will change.

  bool isDrag = false;
  Rectangle theRectangle = new Rectangle
(new Point(0, 0), new Size(0, 0));
  Point startPoint;

  private void Form1_MouseDown(object sender, 
System.Windows.Forms.MouseEventArgs e)

      // Set the isDrag variable to true and get the starting point 
      // by using the PointToScreen method to convert form 
// coordinates to screen coordinates.
      if (e.Button==MouseButtons.Left)
          isDrag = true;

      Control control = (Control) sender;

      // Calculate the startPoint by using the PointToScreen 
      // method.
      startPoint = control.PointToScreen(new Point(e.X, e.Y));

  private void Form1_MouseMove(object sender, 
System.Windows.Forms.MouseEventArgs e)

      // If the mouse is being dragged, 
// undraw and redraw the rectangle as the mouse moves.
      if (isDrag)

          // Hide the previous rectangle by calling the 
	// DrawReversibleFrame method with the same parameters.
		this.BackColor, FrameStyle.Dashed);

          // Calculate the endpoint and dimensions for the new 
       // rectangle, again using the PointToScreen method.
          Point endPoint = ((Control) sender).PointToScreen(new Point(e.X, e.Y));

          int width = endPoint.X-startPoint.X;
          int height = endPoint.Y-startPoint.Y;
          theRectangle = new Rectangle(startPoint.X, 
		startPoint.Y, width, height);

          // Draw the new rectangle by calling DrawReversibleFrame
	// again.  
		this.BackColor, FrameStyle.Dashed);

  private void Form1_MouseUp(object sender, 
System.Windows.Forms.MouseEventArgs e)

      // If the MouseUp event occurs, the user is not dragging.
      isDrag = false;

      // Draw the rectangle to be evaluated. Set a dashed frame style 
      // using the FrameStyle enumeration.
	this.BackColor, FrameStyle.Dashed);

      // Find out which controls intersect the rectangle and 
      // change their color. The method uses the RectangleToScreen  
      // method to convert the Control's client coordinates 
// to screen coordinates.
   Rectangle controlRectangle;
      for(int i = 0; i < Controls.Count; i++)
          controlRectangle = Controls[i].RectangleToScreen
          if (controlRectangle.IntersectsWith(theRectangle))
              Controls[i].BackColor = Color.BurlyWood;

      // Reset the rectangle.
      theRectangle = new Rectangle(0, 0, 0, 0);

.NET Framework
Available since 1.1
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