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Win32 API call in Delphi 3.0 DLL

Posted on 1998-06-29
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Last Modified: 2010-04-04
I'm very new to Delphi, so forgive me if I ask a very stupid question.  
I'm trying to write a function that returns the volume ID of a floppy. When I try to compile the DLL I get the error message: 'undeclared identifier:GetVolumeInformation'. What am I doing wrong?


library MyLib;

uses
  SysUtils,
  Classes;

function GetInfo1 : LongInt ;export;
  var
     dwTemp1, dwTemp2 : LongInt;
  begin
     GetVolumeInformation (
        PChar('A:\'),
        Nil,
        0,
        @Result,
        dwTemp1,
        dwTemp2,
        Nil,
        0
        );
  end;

  exports
    GetInfo1;
end.
0
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Question by:Diver
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4 Comments
 
LVL 5

Accepted Solution

by:
ronit051397 earned 80 total points
ID: 1356325
Add Windows to the uses:

uses
      SysUtils,
      Classes,
      Windows;
0
 
LVL 5

Expert Comment

by:mayhew
ID: 1356326
The problem you are having is that Delphi can't find any function (or anything else) under the name GetVolumeInfo.  If the function is in another .pas file you have to include the name of that file in your uses section.

I checked in sysutils and classes and there is no GetVolumeInfo function.  I also checked through the Delphi help and saw no reference to that function.

May I ask where you found any info on a GetVolumeInfo function?

0
 
LVL 5

Expert Comment

by:ronit051397
ID: 1356327
You need to call GetVolumeInformation.
0
 
LVL 1

Author Comment

by:Diver
ID: 1356328
Never knew that life could be so simple :-) Thanks

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