Своим опытом делится Олег Кулабухов:
Для этого вам понадобится использовать GetDiskFreeSpaceEx() с последующим переводом целочисленных значений к типу Double.
function GetDiskFreeSpaceEx(lpDirectoryName: PAnsiChar; var lpFreeBytesAvailableToCaller : Integer; var lpTotalNumberOfBytes: Integer; var lpTotalNumberOfFreeBytes: Integer) : bool; stdcall; external kernel32 name 'GetDiskFreeSpaceExA'; procedure GetDiskSizeAvail(TheDrive : PChar; var TotalBytes : double; var TotalFree : double); var AvailToCall : integer; TheSize : integer; FreeAvail : integer; begin GetDiskFreeSpaceEx(TheDrive, AvailToCall, TheSize, FreeAvail); {$IFOPT Q+} {$DEFINE TURNOVERFLOWON} {$Q-} {$ENDIF} if TheSize >= 0 then TotalBytes := TheSize else if TheSize = -1 then begin TotalBytes := $7FFFFFFF; TotalBytes := TotalBytes * 2; TotalBytes := TotalBytes + 1; end else begin TotalBytes := $7FFFFFFF; TotalBytes := TotalBytes + abs($7FFFFFFF - TheSize); end; if AvailToCall >= 0 then TotalFree := AvailToCall else if AvailToCall = -1 then begin TotalFree := $7FFFFFFF; TotalFree := TotalFree * 2; TotalFree := TotalFree + 1; end else begin TotalFree := $7FFFFFFF; TotalFree := TotalFree + abs($7FFFFFFF - AvailToCall); end; end; procedure TForm1.Button1Click(Sender: TObject); var TotalBytes : double; TotalFree : double; begin GetDiskSizeAvail('C:\', TotalBytes, TotalFree); ShowMessage(FloatToStr(TotalBytes)); ShowMessage(FloatToStr(TotalFree)); end; |
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