Following on from an earlier post I decided that the speech bubble in that post would look more like a … bubble if the corners were rounded. The relevant geometry to achieve this is a Cubic Bezier Curve. The MSDN page is here.
The abbreviated form is C. It works with 3 parameters:
C[start co-ordinates] [middle co-ordinate] [final co-ordinate]
The following is the geometry for the speech bubble:
The idea is that instead of drawing the line right to the corner, I go to within 10 pixels and curve round the corner. [![roundedtooltip](http://pmichaels.net/wp-content/uploads/2016/03/roundedtooltip.png)](http://pmichaels.net/wp-content/uploads/2016/03/roundedtooltip.png)