Solved

Drive Query under XP.

Posted on 2003-11-25
1
174 Views
Last Modified: 2010-04-05
How can I query if there is media in the A: or B: drive without triggering XP to prompt No Disk when the drive is empty?

DiskFree and DiskSize both cause XP to put up the No Disk dialog. (Interesting sidenote, it doesn't promt when running in the debugger in delphi).
0
Comment
Question by:BJThomsen
1 Comment
 
LVL 8

Accepted Solution

by:
gmayo earned 125 total points
ID: 9820966
For some reason, the floppy drive is completely dumb when it comes to knowing whether there is a disk in there or not. It has to try to access it before telling you whether it is there or not.

There is a previous question on this:
http://oldlook.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_20008825.html
I tried to look at the link (http://www.delphi3000.com/articles/article_1171.asp) which apparently has your answer, however my Intenet connection is playing up and I can't access it.

Also, the following seems to work (D7, XP Home):
procedure TForm1.Button1Click(Sender: TObject);
  function DiskInDrive(Drive: Char): Boolean ;
 var
   ErrorMode: word ;
 begin
   Drive := UpCase(Drive) ;
   if not (Drive in ['A'..'Z']) then
     raise EConvertError.Create('Not a valid drive ID') ;
   ErrorMode := SetErrorMode(SEM_FailCriticalErrors) ;

   try
     if DiskSize(Ord(Drive) - $40) = -1 then
       DiskInDrive := False
     else
       DiskInDrive := True ;
   finally
     SetErrorMode(ErrorMode) ;
   end;
 end;
begin
      if DiskInDrive('A') = false then begin
            ShowMessage('No floppy');
      end;
end;

(Credit to http://oldlook.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_10137545.html)

Geoff M.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

828 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