Solved

Setting DOS Environment Variables

Posted on 1997-03-25
2
179 Views
Last Modified: 2010-04-04
How do I set a DOS environment variable under Delphi 2.0.
I am currently using:-
      SetEnvironmentVariable('DFPATH', NewVarDirectory);

When I do I get an error Stating: "Incompatible Types 'String' and 'PCHAR'"
The variable NewVarDirectory simply holds the new directory name.

When I use
      SetEnvironmentVariable('DFPATH', 'F:\PRG\PROGRAMS');
there is no error generated.

Regards
Eric Kay
0
Comment
Question by:Eric Kay
[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 3

Accepted Solution

by:
mheacock earned 100 total points
ID: 1334959
your variable NewVarDirectory is a variable of type string.
All Win API functions require null-terminated strings
or PChars.

You'll need to convert the string to a PChar before you use it.
Or, if you are using D@, you can typecast the string.

There are conversion functions...StrPCopy and StrPas that
will do the trick.  See the help files.

If you want to typecast, do the following:

   SetEnvironmentVariable('DFPATH', PChar(NewVarDirectory));

0
 
LVL 3

Expert Comment

by:mheacock
ID: 1334960
D@ = Delphi 2

Forgot to let go of the shift key.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
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…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

735 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