PIO-D64/PIO-
D64U User’s Manual ( Ver.1.
6, Mar. 2015, PMH-007-16 ) ----- 37
5. DLL Function Description
The DLL driver is the collection of function calls of the PIO-DIO cards for
Windows 98/Me/NT/2K and 32-bit Windows XP/2003/Vista/7 system. The
application structure is presented as following figure. The user application
program developed by designate tools like VB, Delphi and Borland C
++
Builder
can call PIODIO.DLL driver in user mode. And then DLL driver will call the
PIO.sys to access the hardware system.
Figure 5.1
Development
Toolkit
User's Application
DLLs
.VXDs, .SYSs (Device Driver)
Function Call into DLLs
Services Call into Kernel-Mode
Hardware Devices
Device Control
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