Kengwen,

I think Christof's reply deals with the "DOS" window that shows up. As far as the rest goes you may have some major rewriting to do because Windows does not allow the same low level access to I/O ports and memory that you have in DOS. Have you contacted the manufacturer of the card you are trying to talk to and see if they have a set of DLLs for Win32?

> i using masm version 5.0 to write an I/O interface control run under DOS.
>Since i wish to run under window based application and provide agraphic user interface, i wish to interface with Visual Foxpro.
> To interface with the low level language it need to using DLL libraries
>. By using inline assembler on visual c++, i think the problem can be solve.
> I had tried to write a simple inline assembler code on visual c++, and
>succeed to compile it . When i run the .exe file , the dos window was appear.
> Do you know how to prevent the dos windows appear on the screen?Since
>i wish to run under fully window based. Is it i need to change to win32 bit
>masm ?