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+CoolProp Delphi Wrapper Demo.
+Bruce Wernick, info@coolit.co.za
+13 December 2015
+
+This demo is based on the win32 shared DLL downloaded from the CoolProp site.
+
+There are two parts to the demo:
+  1. The actual DLL interface.
+  2. A simple ph-chart builder.
+
+The original code was written in C++.  In the source folder, you can find the text file exports.txt 
+that details the complete list of functions exported by the CoolProp DLL.  I have only implemented 
+the essential ones but it would be easy to add any ones I have omitted.  The interface mimics the 
+C header file but there are a few options.  The returning string is an array of char.  In Delphi, 
+you could use an array of char parameter.  Instead, I chose to use the PAnsiChar because it makes 
+the dll interface simplere and more universal.  One thing you have to be aware of - the calling 
+program has to create a buffer for the result.  If this is not sized sufficiently, then a blank string 
+is returned.  This could happen, for example, if a lot of fluids are added to the file.
+
+The graphical part draws the saturation curve on conventional log(p) vs enthalpy axes.  The program main 
+form has a Delphi VCL TListView and a TPaintBox.  On startup, the program uses the DLL to populate the 
+ListView with all of the available fluids.  The PaintBox is a very basic components that is basically 
+just a canvas.  The main program creates a TMolChart class that does all the work on a canvas.  When 
+the OnPaint fires in the main form, the chart is re-drawn.
+
+The chart is auto scaled around the critical point and atmospheric pressure (where possible).  This 
+makes it quite convenient for comparing the shape of the various saturation curves.  What it needs is 
+some isotherms and some isentropic lines.  If anyone has the urge to add these I would like to get an 
+update.
+
+
+Lazarus users
+With some minor changes, you could quite easily run this code with Lazarus.
+
+