分类
delphi三十六计之磁盘篇
1．读硬盘序列号
function GetDiskSerial(DiskChar: Char): string;
var
SerialNum : pdword;
a, b : dword;
Buffer : array [0..255] of char;
begin
result := "";
if GetVolumeInformation(PChar(diskchar+":"), Buffer, SizeOf(Buffer), SerialNum,
a, b, nil, 0) then
Result := IntToStr(SerialNum^);
end;
2．检查磁盘是否就绪
Function DiskReady(Root: string) : Boolean;
var
Oem : CARDINAL ;
Dw1,Dw2 : DWORD ;
begin
Oem := SetErrorMode( SEM_FAILCRITICALERRORS ) ;
if LENGTH(Root) = 1 then Root := Root + ":\" ;
Result := GetVolumeInformation( PCHAR( Root ), NIL,0,NIL, Dw1,Dw2, NIL,0 ) ;
SetErrorMode( Oem ) ;
end;
3．检查驱动器A中磁盘是否有效
type
TDriveState = (DSNODISK, DSUNFORMATTEDDISK, DSEMPTYDISK, DSDISK_WITHFILES);
……
function DriveState (driveletter: Char) : TDriveState;
var
mask: String[6];
sRec: TSearchRec;
oldMode: Cardinal;
retcode: Integer;
begin
oldMode := SetErrorMode(SEM_FAILCRITICALERRORS);
mask:= "?:*.*";
mask[1] := driveletter;
{$I-}
retcode := FindFirst (mask, faAnyfile, Srec);
FindClose(Srec);
{$I+}
case retcode of
0 : Result := DSDISK_WITHFILES; //磁盘有文件
-18 : Result := DSEMPTYDISK; //好的空磁盘
-21, -3: Result := DSNODISK; //NT,Win31的错误代号
else
Result := DSUNFORMATTEDDISK;
end;
SetErrorMode(oldMode);
end;