Hi, Apache uses php and in php configuration file is a whole section about MySQL and entry mysql.default_port. If you'd like to change that port you can modify my.cnf file (MySQL configuration file). ----------- Mila

Another good idea would be to implement a registration service via http. You have a 99% chance that you clients would have port 80 open. Perhaps in you VS app you can have a link to your server which will allow then to register from there.

If graphics performance is the issue then you need to develop a couple test programs in C# to determine if the performanace obtained is suitable. You can always eek out greater performance by dropping down the VC++ but you might want to reserve that as your last option Mike

The magnified portion is plotting a lissajous signal, so the display width isn't a factor. I thought about "skipping" datapoints, but wouldn't that misinterpret the data being displayed? Thanks for the reply

If you're using C# 2005 you can use the [OptionalFieldAttribute] on new class variables, and when you deserialize the class, the vars that have the above tag wont be required and therefore wont throw an exception. If you're using C# 2003, you can look into manually controlling the serialization process. BTW: M$ is giving away C#, VB, and C++ express for free until Nov. 2006. If you get them before then, you will never have to pay for them. You can download CD images of each.

If you do want to use DirectX take a look at overlays. That will allow you to create an area within your window to draw your charts without giving up all of the other UI niceties of C# and GDI+. My guess is that there isn’t anything here that you can’t do using GDI+. Here are a few things to check: Are you redrawing the background of your graph each time? It’s likely that a large number of drawing commands are spent redrawing an unchanging background every time the graph is drawn. Try caching the background and Blit it to your graph area. Are you using DrawLine or DrawLines? DrawLines is much faster. Is it really the drawing that is slow? Have you looked at the code with a profiler to see which methods are taking the longest? Regarding the double buffering, are you doing the buffering yourself in an off-screen object, or are you using the double buffer control style? Also, what are the timers for?

QuickUsb from BitWise Systems. www.bitwisesys.com[^] /\ |_ E X E GG

let u=ln(x) then y = a + b*u now use the method of least squares to find a and b. Note: you are using the method of least squares to find y(u), so everywhere you would use x in least squares now use u(=ln(x)). There are several good resources on the web. Google for 'Least squares' and 'logarithm'. -Sean ---- Shag a Lizard

If you are responsible for drawing the graph then you need to take care to only draw the area specified in PaintEventArgs.ClipRectangle, which is the invalidated area of your control. The whole graph does not need to be repainted unless, of course, the clipping area covers the entire control. This posting is provided "AS IS" with no warranties, and confers no rights. Software Design Engineer Developer Division Sustained Engineering Microsoft [My Articles] [My Blog]

You may want to read up on Big Endian and Little Endian byte order for number representation. Intel Processors are Little Endian (PCs) Motorola Processors are Big Endian. Depending on how the file was created and on what operating system it could be stored either way. Little Endian is LSB then MSB. Big Endian is MSB then LSB. e.g. The hex value 0x7FFF when stored in: Little Endian = FF 7F Big Endian = 7F FF within the file. Note: Network packets have numbers stored in Big Endian no matter what OS originated them. I would suggest reading the raw data into a buffer then looking at the buffer contents (2-bytes at a time). You may be able to analyse why the numbers are not showing as you expect. Note: For a signed short(2-byte integer) the positive values will be 0x0000..0x7FFF and the negative values are 0x8000..0xFFFF. Ant. I'm hard, yet soft. I'm coloured, yet clear. I'm fruity and sweet. I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

That’s the OSs memory management and optimization in action If you minimize an app, it does not need to be as responsive as an active app. So the OS optimizes the situation by moving most of the app data to virtual memory, so the physical memory usage is reduced and that real estate is available for active foreground apps. If you maximize it again, the reverse thing happens. ;) Salil Khedkar [^]

This need to be done as part of your setup routine, like an installation program. Visual Studio .NET has a deployment project that makes this very easy. Otherwise, read Creating a File Association[^] in the Platform SDK. Your setup routine should not hard-code the path to your executable. Using VS.NET's Windows Installer project you can associate your executable file with the extension so that the right path is used. In less "automated" setup environment you associate the executable's file path with the target application for that file extension. Just try it out. It's quite easy. This posting is provided "AS IS" with no warranties, and confers no rights. Software Design Engineer Developer Division Sustained Engineering Microsoft [My Articles] [My Blog]

bwagz wrote: so I have no clue on how to do this. Any help greatly appreciated Read Creating a File Association[^]. - Nick Parker My Blog | My Articles