| Description |
The DiskFree function gives the amount of free space on Drive.
If the drive is invalid, or does not contain media, -1 is returned
If the drive is read-only, 0 is returned.
The Drive is designated as follows:
| 1 | = A drive |
| 2 | = B drive |
| 3 | = C drive |
| ... | |
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| Related commands |
| DiskSize |
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Gives the size in bytes of a specified drive |
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| Example code : Show the free space on drives B to F on your PC |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
SysUtils, // Unit containing the DiskFree command
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
i : Integer;
space : Int64;
begin
// Display the free space on drives B, C, D, E, F, where present
for i := 2 to 6 do
begin
space := DiskFree(i);
if space >= 0
then ShowMessage(Chr(i+64)+' Drive free space = '+
FloatToStrF(space, ffNumber, 20, 0))
else ShowMessage(Chr(i+64)+' Drive not present');
end;
end;
end.
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| Hide full unit code |
Example output is as follows:
B Drive not present
C Drive free space = 8,414,223,678
D Drive free space = 4,127,004,529
E Drive free space = 0
F Drive free space = 0
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