PointF in .NET Framework is not present for Device Applications

Hi,

I am working on an embedded medical device that takes inputs from various sensors and uses the data to display various graphs using .NET Framework 2.0. The OS used is WinCE 6.0, the .dlls are development in C# as a Device Application.

I find that the PointF API present in System.Drawing namespace is not present in for .dlls that are created as a Device Application. However PointF is present for projects created as Windows Applications.

I need to use the floating point PointF in this.CreateGraphics().DrawLines API for precision in drawing the graphs. 

Can you please let me know why PointF is not present for Device Applications and if there is any other alternative around this.

Thanks,

Chethana