Rockwell-automation 1747-PCINT API Software for 1746 I/O Manual de usuario descargar pdf (Pagina 17)

Publication 1747-6.5.3 June 1998

Chapter

Using the API

Introduction This chapter describes the API and how to use its components. For more information

about developing applications using the API, see chapter 3.

Getting Started To use the API, make sure you have copied the following files to your development

directories. The sample files are optional.

Your application must link to the appropriate library (

ocapil.lib for DOS or

ocapi.lib

for Windows NT) and include ocapi.h. You can copy the sample files

and adapt them for your application.

Programming

Conventions

The API is supplied as an object code library file (ocapil.lib) or a DLL

(

ocapi.dll) that you link with the host application’s object code using

commercially-available tools.

This file: Contains:

ocapil.lib API functions that you link to your application (DOS only)

ocapi.lib Import library in Microsoft COFF format (Windows NT only)

ocapi.h API header file that contains API-referenced structures

ocapi.dll API DLL (Windows NT only)

sample.c Sample application program calling the API functions

sampleb.mak Sample MAKE file for the Borland C compiler

samplem.mak Sample MAKE file for the Microsoft C compiler

This convention: Considerations:

calling convention

The DOS API functions are specified using the C programming language syntax. To allow you to

develop control applications in other programming languages, the API functions use the standard

Pascal calling convention.

The Windows NT API supports any programming languages that use the Win32 _stdcall calling

convention for application interface functions. The Windows NT API function names are exported

from the DLL in undecorated format to simplify access from other programming languages.

header files

The API includes a header file (ocapi.h) that contains API function declarations, data structure

definitions, and other constant definitions. The header file is in standard C format.

sample code

The API comes with sample files to provide an example application that communicates with the

scanner. The sample files include all source files and MAKE files required to build the sample

application.

compiler support

The DOS API is supplied in the large memory model, compatible with both Microsoft and Borland

compilers. The DOS library (ocapil.lib) is compiled as a 16-bit MS-DOS library using the

80386 instruction set.

The Windows NT library (ocapi.dll) is compiled for use with Microsoft Visual C++ or

Borland C++.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 154 155

Comentarios a estos manuales

Sin comentarios

Rockwell-automation 1747-PCINT API Software for 1746 I/O Manual de usuario Pagina 17

Comentarios a estos manuales

Relacionado con productos y manuales para Equipo Rockwell-automation 1747-PCINT API Software for 1746 I/O