Example 2 — Circle with Color and Border

Created: 2026-05-27 · Updated: 2026-05-27

← Advanced Snippet Editor

A circle with a fill color and a colored border. Shows how to position a perfect circle using its center point (instead of a corner) and how to set a visible border.

Result

Code

/* PARAMS */
float cx    = 200f;   // center X
float cy    = 200f;   // center Y
float size  = 150f;   // diameter
var   fill  = System.Drawing.Color.FromArgb(52, 152, 219);
var   line  = System.Drawing.Color.FromArgb(41, 128, 185);
/* END PARAMS */

var oCircle = ppptools.AddOval(cx - size/2f, cy - size/2f, size, size);

oCircle.Name = "MyCircle";
oCircle.Fill.ForeColor.RGB =
    System.Drawing.ColorTranslator.ToOle(fill);
oCircle.Fill.Transparency = 0f;
oCircle.Line.Weight = 2f;
oCircle.Line.ForeColor.RGB =
    System.Drawing.ColorTranslator.ToOle(line);

Step-by-Step Explanation

1. Circle vs. Oval — msoShapeOval

PowerPoint has no dedicated "circle" type. msoShapeOval creates an oval. When width == height, the result is a perfect circle.

ppptools.AddOval(
    cx - size/2f, cy - size/2f,   // top-left corner
    size, size);                   // width = height → circle

2. Center-Point Coordinates

AddShape expects the top-left corner (not the center point). To center a circle at (cx, cy), calculate:

left = cx - size/2
top  = cy - size/2

Example: cx=200, cy=200, size=150 → left=125, top=125

This is a common pattern: shapes are often defined geometrically by their center, but PowerPoint needs the corner.

3. Border Color and Thickness

oCircle.Line.Weight = 2f;          // thickness in PT
oCircle.Line.ForeColor.RGB =
    System.Drawing.ColorTranslator.ToOle(line);

Unlike Example 1 (no border), here a visible border is set. Line.Weight is the thickness in points. Line.ForeColor.RGB is the border color — separate from Fill.ForeColor.

Back: Example 1 — Rectangle · Next: Example 3 — Union