function GetLastErrorString : string;
begin
SetLength(Result, MAX_PATH);
SetLength(Result, FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM OR
FORMAT_MESSAGE_ARGUMENT_ARRAY, nil, GetLastError, 0, pchar(Result),
MAX_PATH, nil) - 2);
end;
function API_GetVolumeInformation(Root : string; out VolName, FileSysName :
string; out VolSerial, FileMaxLen, FileFlags : DWORD) : boolean;
begin
SetLength(VolName, MAX_PATH);
SetLength(FileSysName, MAX_PATH);
Result := GetVolumeInformation(pchar(Root), pchar(VolName), MAX_PATH,
@VolSerial, FileMaxLen, FileFlags, pchar(FileSysName), MAX_PATH);
if (Result) then begin
SetLength(VolName, StrLen(pchar(VolName)));
SetLength(FileSysName, StrLen(pchar(FileSysName)));
end
else begin
SetLength(VolName,0);
SetLength(FileSysName,0);
VolSerial := 0;
end;
end;
procedure TfApp.Button1Click(Sender: TObject);
var
RPN, VolN : string;
VSN : DWORD;
MCL : DWORD;
FSF : DWORD;
FileSysN : string;
begin
RPN := '\';
if (API_GetVolumeInformation(RPN, VolN, FileSysN, VSN, MCL, FSF)) then
Application.MessageBox(pchar(VolN + ' | ' + FileSysN + ' | ' +
IntToStr(VSN) + ' | ' + IntToStr(MCL)), pchar('Success'), MB_OK)
else
Application.MessageBox(pchar(GetLastErrorString), pchar('Error'),
MB_OK);
end;
*********************************************************************************
Hi!
This works for me:
8<
---------------------------------------------------------------------------
--------------
//this is from a class of mine
Procedure TLocalDrive.ReadDriveInfo;
VAR
l_Flags : DWORD;
l_Label : AnsiString;
l_MaxLength : DWORD;
l_Name : AnsiString;
l_Root : AnsiString;
l_Serial : PDWORD;
begin
{get volume info from WinAPI}
l_Root := GetRoot; // ie 'A:\'
SetLength(l_Label, 12);
SetLength(l_Name, 12);
IF GetVolumeInformation(PAnsiChar(l_Root), //root dir
PAnsiChar(l_Label), //label buffer
Length(l_Label), //label buffer length
l_Serial, //serial number
l_MaxLength, //max. filename length
l_Flags, //file system flags
PAnsiChar(l_Name), //file system name
Length(l_Name) //file system name length
)
then
BEGIN
FLabel := l_Label;
FSerial := l_Serial^;
FMaxFileName:= l_MaxLength;
FFSflags := l_Flags;
FFSname := l_Name;
END
else
BEGIN
RAISE CreateDriveException(FName, GetLastError);
END;
end;{TLocalDrive.ReadDriveInfo}