Solved

How should DLL handle exception generated when it is loading

Posted on 1999-01-21
1
183 Views
Last Modified: 2010-04-06
I'm writing a DLL that initialises its internal object etc. based on an data held in an INI file - when the the DLL is loaded by an application (using LoadLibrary) initialization section code for various units in the DLL is executed.  

However, I want to be able to handle cases where the INI file is missing or its data invalid.  So far I raise an exception if any of these values are invalid but a run-time 217 error is generated by doing this.  Is there a more graceful way of handling errors when a DLL is being loaded.  Should I be raising exceptions in a DLL when it is loaded / freed.

Thanks

Andrew
0
Comment
Question by:andrewjackson
[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
1 Comment
 
LVL 1

Accepted Solution

by:
zwarte earned 100 total points
ID: 1362679
Build a function in you dll trying to initialize it
if it fails you return false else true so that your program can decide wether or not the initialization worked or not

ex.
 in the dll

function initialize(x,y,z):boolean
var
   status
begin
   status:=true;
   if fileexists('c:\x.ini') then
      status:=true;
   else
      status:=false;
   .....
   result:=status;
end;

in your main program

if not initialize(x,y,z) then
   showmessage('dll did not initialize for some reason');
else
  ....

Or something like that ;-)
0

Featured Post

Enroll in June's Course of the Month

June’s Course of the Month is now available! Experts Exchange’s Premium Members, Team Accounts, and Qualified Experts have access to a complimentary course each month as part of their membership—an extra way to sharpen your skills and increase training.

Question has a verified solution.

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

Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

705 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