?
Solved

Borland C++ .... SetupGetStringField (returning a value from a INF File)

Posted on 2003-11-17
2
Medium Priority
?
949 Views
Last Modified: 2012-06-27
Hello,

I've used an INF file on our current application to store some parameters.
However, we appear to be experiencing problems with the SetupGetStringField function.
i.e. it doesn't appear to be returning anything.


I've used SetupOpenInfFile to open the INF file and SetupFindFirstLine to find the first line which contains the relevant section and key.
However SetupGetStringField  doesn't appear to be working.


Can you have a look at the code to see what the problem is and/or suggest a different approach which be easier?

hope you can help.


Cheers, weslondon


~~~~~~~~~~~~~

        DWORD dwResult;
        HINF hInf;                     //variable to hold the INF handle
        UINT ErrorLine;                //variable to hold errors returned

        INFCONTEXT aContext = {0};
        char *  aReturnBuffer;
        DWORD aReturnBufferSize;
        PDWORD aRequiredSize;

        BOOL aLineFound = 0;
        BOOL aStrEntryFound = 0;

        strcpy (aInfName, "C:/Inf.inf");

        hInf = SetupOpenInfFile (
               aInfName,
               NULL,
               INF_STYLE_WIN4,
               &ErrorLine);           //line number of the syntax error

        if (hInf == INVALID_HANDLE_VALUE)
        {
            return NULL;
        }
        else
        {
            // Find correct line - using aSection and aKey

            aLineFound = SetupFindFirstLine(
                hInf,              // handle to an INF file
                aSection,      // section in which to find a line
                aKey,              // optional, key to search for
                &aContext      // context of the found line
            );

            if (aLineFound)
            {
                // Extract value using &aContext

                aStrEntryFound = SetupGetStringField(
                &aContext,                    // context of the INF file
                1,                            // index of the field to get
                aReturnBuffer,            // optional, receives the field
                aReturnBufferSize,            // size of the provided buffer
                NULL                      // optional, buffer size needed
                );
            }
            if (aStrEntryFound)
            {
                SetupCloseInfFile(hInf);
                return aReturnBuffer;
            }

~~~~~~~~~~~

N.B aStrEntryFound is false
(i.e. nothing returned in aReturnBuffer)



0
Comment
Question by:weslondon
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 9765840
You are not specifying a valid return buffer - use

       char *  aReturnBuffer [ 1024]; // or whatever size is appropriate
       DWORD aReturnBufferSize = sizeof ( aReturnBuffer);

The docs state: "ReturnBuffer
This optional parameter points to a caller-supplied buffer "
0
 
LVL 86

Accepted Solution

by:
jkr earned 2000 total points
ID: 9765849
Ooops, sorry, that should read

      char  aReturnBuffer [ 1024]; // or whatever size is appropriate
      DWORD aReturnBufferSize = sizeof ( aReturnBuffer);
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Written by John Humphreys C++ Threading and the POSIX Library This article will cover the basic information that you need to know in order to make use of the POSIX threading library available for C and C++ on UNIX and most Linux systems.   [s…
Container Orchestration platforms empower organizations to scale their apps at an exceptional rate. This is the reason numerous innovation-driven companies are moving apps to an appropriated datacenter wide platform that empowers them to scale at a …
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

801 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question