Solved

Console I/O, Running External .exe commands - Help

Posted on 1997-08-04
2
195 Views
Last Modified: 2010-04-04
I am using Delphi 2, after upgrading from Delphi.

1. How do you handle console input/output (there used to be a wincrt unit)?

2. How do you call an external "command line" program from within a delphi
2 program?  

3. Can you retrieve error code from a called module in this fashion?

Thanks for your comments/examples.

-Joe.
0
Comment
Question by:jmangal
2 Comments
 
LVL 1

Accepted Solution

by:
buemoh earned 50 total points
ID: 1340509
ad 1.
in Delphi 2.x you can build consol applications with the compiler directive {$APPTYPE Console}. Afterwards you can use the buildin routines write, writeln, read, readln for console input and output.
Otherwise you can open the StdIn and StdOut via filehandles, like this:

var
  i_StdOut : integer;
  Written : integer;

begin
  i_StdOut := GetStdHandle ( STD_OUTPUT_HANDLE ) ;
  FileWrite( i_StdOut, 'This is a test', length( 'This is a test' ), Written, nil );
  CloseHandle( i_StdOut );
end;

See more about this in the ONLINE helpfiles of Delphi.


ad 2.
You can either use WINEXEC or CREATEPROCESS to start external programs. The comandline can be read with the routine PARAMSTR( parameternumber ), like this:

{ read all commandline arguments and send it to StdOut  }
for counter:=1 to ParamCount do
  writeln( PARAMSTR( counter ) );

If you need more details and some code, please e-mail.


ad 3.
If you call an external program with WINAPI then you can also get the errorcodes of this programs, but generally you can use the WINAPI call GETLASTERROR to find out the last errorcode.

This answer is quit short, but I hope this is what you want, if not, drop it away. More details can be discussed via e-mail.

Bye

Hartwig

-----------------------------------------------------------
///\\\ Hartwig MOTAL ///\\\  e-mail: moh@bue.magwien.gv.at
 Weinberggasse 60/9/7, A-1190  Vienna/Austria/Europe

0
 

Author Comment

by:jmangal
ID: 1340510
I sent you an email message.  I would like to see a code sample if possible as the online help stuff seems to be in C?..

Thanks.  -Joe.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
code issue 8 97
error 1.1 400 Bad request idhttp delphi 18 52
select query - oracle 16 91
Convert a string into a TDateTime 5 50
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
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…
This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory. NOTE: For Outlook 2016 and 2013 perform the exact same steps. Open a new email: Click the New email button in Outlook. Start typing the address: …
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

943 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

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now