Kengwen,

You don't "run" a DLL, you call it like any other function. In the spyin.zip file you got from my website look in the help file and the spyin form it'll show you how you DECLARE the name of the function and call it from inside VFP.

Once you get that part worked out you'll have to see if you get protection faults trying to access the I/O port. You may need to get some of the Device Driver Kits from MS (which I think are only available via a MSDN subscription now) in order to talk to the low level hardware. There is a huge difference between Win95 and NT in this area.

> You said Windows does not allow the same low level access to I/O ports and memory that i have in DOS, thats mean i cann't use the i/o port which is already in used by windows?
> The i/o interface card i have ,is using i/o address form 2E0h~2F1H and i
>checked already that there is not conflict to the windows i/o port address.
> i also simply create a inline assembler code on Visual C++, which can read or write to the particular i/o address port. When i run the .exe file the windows didn't appear any error message, it just appear a dos windows on the screen, and prompt the message" press any key to continue" when i press any key the dos windows is close.So i think didn't have any conflict to the windows assigned i/o port address.
> i try to create an dll project and add a c++ source file the type my inline assembler code, i had not problem to compile the .cpp and build the .dll file but after that i want to run the executable file, i can not find the .exe file to run. Can you tell me how to run the dll file which i had create?