** IMPORTANT ** : run Setup.Bat before trying the demo.

Running Setup.Bat will copy the uCalc DLLs and headers to the proper directories.

Please note that the spreadsheet demo is NOT intended to show how to create a real spreadsheet.
Instead, its sole purpose is to demonstrate how the Overwrite feature (new in version 3.0) works.
It allows you to redefine a function in such a way that other functions that referred to it are
affected accordingly when re-evaluated (without re-parsing).  Here is the key line of code (in VB.NET):

ucDefine("Overwrite ~~ Func: " & txtCellName.Text & "() =" & txtCellFormula.Text)

See the Spreadsheet subdirectory for your compiler for the actual demo.