请问delphi中对光驱的控制牵涉到哪几个函数？

Question

隐藏光驱
控制光驱开关
//打开光驱  
mciSendString('Set cdaudio door open wait', nil, 0, handle);  
//关闭光驱  
mciSendString('Set cdaudio door closed wait', nil, 0, handle)  

Answer 1

监视光驱中是否有光盘拦截消息WM_DEVICECHANGE即可！ 
//响应该消息 
procedure Tform1.WMDEVICECHANGE(var msgx :Tmessage); 
const 
  DBT_DEVICEARRIVAL=$8000; 
  DBT_DEVICEREMOVECOMPLETE=$8004; 
begin 
  inherited; 
  case msgx.WParam of 
    DBT_DEVICEARRIVAL:Caption :='有了！'; 
    DBT_DEVICEREMOVECOMPLETE:Caption :='取走了'; 
  end; 
end; 

Answer 2

unit CXDiskFileUtils;interfaceuses Classes, Sysutils;
//////////////CDRom Utils//////////////////////
//获得CDRom 序列号
function GetdiskserilNum(ADrive: string): string;
//获得CDRom卷标，返回''表示驱动器中没有光盘
function GetCDRomLabel(ADrive: string): string;
//获得第一个CDRom,返回''表示驱动器中没有光盘
function GetFirstCDROM: ShortString;
//获得系统驱动器列表
procedure Getdisks(Strings: TStringList);
//打开光驱
procedure OpenCDRom;
//关闭光驱
procedure CloseCDRom;
//切换光驱自动运行功能,设置在Windows重新启动后将生效
procedure SetCDRomAutoRun(AutoRun:Boolean);implementationuses Windows, MMSystem;
//////////////CDRom Utils////////////////////////////function GetdiskserilNum(ADrive: string): string;
var
  VolumeName    : array[0..255] of char;
  FileSystemType   : array[0..255] of char;
  SerialNum    : DWORD;
  MaxFilenameLength   : DWORD;
  Flags     : DWORD;
begin
  if (GetVolumeInformation(PChar(ADrive),
                           VolumeName,
                           256,
                           @SerialNum,
                           MaxFilenameLength,
                           Flags,
                           FileSystemType,
                           256)) then
  Result := (IntToHex(SerialNum shr 16, 3) +
             IntToHex((SerialNum shl 16) shr 16, 4));
end;function GetCDRomLabel(ADrive: string): string;
var
  VolumeName    : array[0..255] of char;
  FileSystemType   : array[0..255] of char;
  SerialNum    : DWORD;
  MaxFilenameLength   : DWORD;
  Flags     : DWORD;
begin
  //Result := '驱动器中没有CDRom';
  if (GetVolumeInformation(PChar(ADrive),
                           VolumeName,
                           256,
                           @SerialNum,
                           MaxFilenameLength,
                           Flags,
                           FileSystemType,
                           256)) then
  Result := VolumeName;
end;function GetFirstCDROM: Shortstring;
var
  AList                         : TStringList;
  Counter                       : integer;
begin
  //Result := '驱动器里无CDRom';
  AList := TStringList.Create;
  Getdisks(AList);
  for Counter := 0 to AList.Count-1 do
    if GetDriveType(PChar(Alist.Strings[Counter])) = DRIVE_CDROM then
      Result := Alist.Strings[Counter]
end;procedure Getdisks(Strings: TStringList);
const BufSize = 256;
var
  Buffer                    : PChar;
  P                            : PChar;
begin
  GetMem(Buffer, BufSize);
  try
    Strings.BeginUpdate;
    try
      Strings.Clear;
      if GetLogicalDriveStrings(BufSize, Buffer) <> 0 then begin
        P := Buffer;
        while P^ <> #0 do begin
          Strings.Add(P);
          Inc(P, StrLen(P) + 1);
        end;
      end;
    finally
      Strings.EndUpdate;
    end;
  finally
    FreeMem(Buffer, BufSize);
  end;
end;procedure OpenCDRom;
begin
  mciSendString('Set cdaudio door open wait', nil, 0, 0);//handle);
end;procedure CloseCDRom;
begin
  mciSendString('Set cdaudio door closed wait', nil, 0, 0);//handle);
end;procedure SetCDRomAutoRun(AutoRun:Boolean);
const
  DoAutoRun : array[Boolean] of Integer = (0,1);
var
  Reg:TRegistry;
begin
  try
    Reg := TRegistry.Create;
    Reg.RootKey := HKEY_LOCAL_MACHINE;
    if Reg.KeyExists('System\CurrentControlSet\Services\Class\CDROM') then
      if Reg.OpenKey('System\CurrentControlSet\Services\Class\CDROM',FALSE) then
        Reg.WriteBinaryData('AutoRun',DoAutoRun[AAutoRun],1);
  finally
    Reg.Free;
  end;
  //设置在Windows重新启动后将生效
end;end.

Answer 3

和DELPHI无关,由于WINDOW的原因,不依靠VXD和汇编的情况下对硬件操作只能用API!