Re: Notes from Paul de Leeuw et al regarding WinFract I've been running FractInt formulas and Par's in a program I built in Visual (and Power) Basic. Before anybody laughs, I should point at that this is no Mickey-Mouse program at all! I divided the project into 4 distinct components: 1. Fractal Engine - raw calculations 2. Formula interpreter 2. Display/graphics 3. Front-end, UI VB's IDE made the engine development easy to modify and test. Once I had a good initial version I then switched it into PowerBasic (which runs VB-syntax code much faster and makes DLL's). All other functions are done by VB (using API for graphics, of course). I don't need anything fancy, as my preferred mode of operation is to use online display as a guide only - I save images (like Fractint does with the "saveiter"), and have a separate render program for experimenting with colouring. It's all floating-point, I use 80-bit FP in the Engine (PowerBasic has an "Ext" datatype for this), and am currently looking at GMP/MPFR as an arbitrary-precision option. The advantage of all this is that front-end changes and extensions are very easy to do in VB, and I don't have to deal with MFC at all, VB does it for me. Jim White MathImagics, Uki NSW, Australia Jim.White@defra.gsi.gov.uk Department for Environment, Food and Rural Affairs (Defra) This email and any attachments is intended for the named recipient only. Its unauthorised use, disclosure, storage or copying is not permitted. If you have received it in error, please destroy all copies and inform the sender. Whilst this email and associated attachments will have been checked for known viruses whilst within Defra systems we can accept no responsibility once it has left our systems. Communications on Defra's computer systems may be monitored and/or recorded to secure the effective operation of the system and for other lawful purposes.