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...get the free, total size of a disk disk volume?
Autor: abdulhamid ateeq alsaady
[ Print tip ]  

Tip Rating (14):  
     


{
  * Place a Button1 and DriveComboBox1 on your form.
  * The function "SetCurrentDir" well be true if the disk in drive
  * The procedure "GetDiskFreeSpaceEx" returns the free and total disk size
}

uses
  
SysUtils;

implementation

function 
GetDiskSize(drive: Char; var free_size, total_size: Int64): Boolean;
var
  
RootPath: array[0..4] of Char;
  RootPtr: PChar;
  current_dir: string;
begin
  
RootPath[0] := Drive;
  RootPath[1] := ':';
  RootPath[2] := '\';
  RootPath[3] := #0;
  RootPtr := RootPath;
  current_dir := GetCurrentDir;
  if SetCurrentDir(drive + ':\') then
  begin
    
GetDiskFreeSpaceEx(RootPtr, Free_size, Total_size, nil);
    // this to turn back to original dir
    
SetCurrentDir(current_dir);
    Result := True;
  end
  else
  begin
    
Result := False;
    Free_size  := -1;
    Total_size := -1;
  end;
end;


procedure TForm1.Button1Click(Sender: TObject);
var
  
free_size, total_size: Int64;
begin
  if 
GetDiskSize(DriveComboBox1.Drive, free_size, total_size) then
    
ShowMessage('free space =' +
      IntToStr(free_size) + #13 + 'total size=' +
      IntToStr(total_size))
  else
    
ShowMessage('No disk in drive!');
end;


 

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