The Create Circle edit control provides a graphical user interface to the CogCircle coclass, which creates a new circle. The edit control allows you to specify the center and radius of the circle, dictate which graphics appear as the tool executes, and view tool results. The following figure shows the Create Circle edit control:

The edit control offers the following features:

• A row of control buttons at the top left
• A set of function tabs to define the center and radius of the circle, choose what graphics the tool will use, and view results
• An image display window for displaying tool images and graphics

You can experiment with the edit control by using QuickBuild to create a CogCreateCircle tool. A new CogCreateCircle tool appears as shown in the following figure:

To include the edit control in your custom vision application, you must first add it to your Visual Studio.NET development environment. See Using Edit Controls in Your Custom Vision Applications for more information.

The following table describes the function of each button:

Table 1. Control buttons

Button	Description	Function
	Run	Creates a circle with the parameters specified in the Settings tab
	Electric mode	Toggles electric mode, where the Create Circle tool executes automatically when particular configuration parameters change. In electric mode, a lightning bolt appears next to every electric property
	Local image display	Opens or closes the local image display window. A Create Circle tool supports the following image buffers: The Current.InputImage buffer contains the current image and the currently defined circle. The LastRun.InputImage buffer contains the results of the tool after it creates a circle.
	Floating image display	Opens one or more floating image windows, which support the same image buffers as the local image display window
	Open	Opens a VisionPro persistence (.vpp) file that contains a set of saved properties for this vision tool object type. VisionPro reports an error if you try to open a .vpp file for another object type.
	Save	Saves the current properties of the vision tool to a VisionPro persistence (.vpp) file. The edit control allows you to choose between saving the vision tool with or without its image buffers and tool results.
	Save As	Saves the current properties of the vision tool to a new VisionPro persistence (.vpp) file
	Reset	Resets the vision tool to its default state.
	Show ToolTips	Enables or disables the display of tooltips for individual items in the edit control
	Help	Opens this VisionPro online help file

Use the Settings tab to configure the circle and the drawing style of the output shape. The following figure shows the Settings tab:

The Settings tab offers the following features:

With the Output drawing style section, you can control the appearance of the output shape that is drawn on the image. See the controls and the example below.

Use the Graphics tab to control which graphics the Create Circle tool generates and displays. The following figure shows the Graphics tab:

The Graphics tab offers the following features:

Use the Results tab to view the parameters of the finished circle. The following figure shows the Results tab:

The Results tab offers the following features: