Chang,

Yes I do remember. As far as I know to access port level I/O under Win32 you must use the DDK (Device Driver Kit) The only way you can get the DDK now is via a MSDN subscription. I've not done port level access coding in several years now all of it that I did was under DOS where it was much easier.

> do remember me? Do you know how to allow the interrupt IN/OUT (using inline assembler) to access the Windows I/O port protect-mode?
>Did you know anyone did this before?
>i try to write a DLL (direct hardware access the I/O port) which allow me to access the 32-bit WinApps .