VB Helper: HowTo: Use a PointF class to find the tangent lines between a point and a circle in Visual Basic 6

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Title	Use a PointF class to find the tangent lines between a point and a circle in Visual Basic 6
Description	This example shows how to use a PointF class to find the tangent lines between a point and a circle in Visual Basic 6.
Keywords	tangents, find tangents, find tangent lines, tangent lines, Visual Basic 6, VB 6, graphics, algorithms, PointF
Categories	Algorithms, Graphics

While trying to use the example Find the tangent lines between a point and a circle in Visual Basic 6 to build a new example that finds the tangnents between two circles, I found the code pretty hard to read. It was difficult passing points back and forth as a pair of values.

This example uses a PointF class to represent points. This class simply has two public fields:

Public X As Single
Public Y As Single

See the previous example Find the tangent lines between a point and a circle in Visual Basic 6 for an explanation of how this example works.

Also see the example Find the tangent lines between two circles in Visual Basic 6.

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