touch screen monitors

Does anyone have an idea how touch screen monitors work. Do we need to code different for those screens?

[Edited by newbee on 06-05-2000 at 03:17 PM]

No, I don't really know how they work. I guess it has something to do with liquid films.
I expect all programs will work as usual, without having to alter them for these screens.

Wouldn't the Windows messages behind the scenes be different? Say with a mouse click, Windows generates wm_lbuttondown and wm_lbuttonup. If a user touching the screen generated the same messages, then vb would work the same, but does anyone know this definitively??

Yes, the coding will be the same.

I think they work with heat sensitivity...

As far as I know, Touch Screen just a very thin layer of resistive sensitive meterial that stick ontop of your monitor.

Beside this, there also have four (most of the touch screen output) TTL (Transistor Transistor Logic) anolog signal output pin that represent your current X1, Y1, X2 and Y2 location on the screen. (I think it is in AC Alternative Current format)

Normally, the tourch screen come with the serial port interface (RS232C standard ). Whereby, you can capture all this signal through the HyperTerminal application. But you may need to convert all the received signal into digital form and that where the Driver come from.

You can write your own drive with the Win9x, WinNT or WinCE SDK or DDk toolkit to help you to archive it.

The touchscrene I'm currenly programming for is connected with the com port, and all input is as if you only use the mouse. So for entering data you need to create on screen keyboard, for the rest you only have to make sure that you make buttons etc. big enough so you can press it with your finger instead of the mouse.

Crazy
Do you know where to pick up infomation on this or where to but the relevant equipment/software.

Gazza

search for touchscreen kiosk. CrazyD is right, the touchscreen actually replaces your mouse but only with one button, no right click.