Mega Code Archive
Open and close a certain CD drive
<![CDATA[
Title: open and close a certain CD-drive?
uses
MMSystem;
// Open , Öffnen
{Simple Way:}
mciSendstring('SET CDAUDIO DOOR OPEN WAIT', nil, 0, Self.Handle);
{More complex way:}
function OpenCD(Drive: Char): Boolean;
var
Res: MciError;
OpenParm: TMCI_Open_Parms;
Flags: DWORD;
S: string;
DeviceID: Word;
begin
Result := False;
S := Drive + ':';
Flags := MCI_OPEN_TYPE or MCI_OPEN_ELEMENT;
with OpenParm do
begin
dwCallback := 0;
lpstrDeviceType := 'CDAudio';
lpstrElementName := PChar(S);
end;
Res := mciSendCommand(0, MCI_OPEN, Flags, Longint(@OpenParm));
if Res 0 then Exit;
DeviceID := OpenParm.wDeviceID;
try
Res := mciSendCommand(DeviceID, MCI_SET, MCI_SET_DOOR_OPEN, 0);
if Res = 0 then Exit;
Result := True;
finally
mciSendCommand(DeviceID, MCI_CLOSE, Flags, Longint(@OpenParm));
end;
end;
//Close, Schliessen
{Simple Way:}
mciSendstring('SET CDAUDIO DOOR CLOSED WAIT', nil, 0, Self.Handle);
{More complex way:}
function CloseCD(Drive: Char): Boolean;
var
Res: MciError;
OpenParm: TMCI_Open_Parms;
Flags: DWORD;
S: string;
DeviceID: Word;
begin
Result := False;
S := Drive + ':';
Flags := MCI_OPEN_TYPE or MCI_OPEN_ELEMENT;
with OpenParm do
begin
dwCallback := 0;
lpstrDeviceType := 'CDAudio';
lpstrElementName := PChar(S);
end;
Res := mciSendCommand(0, MCI_OPEN, Flags, Longint(@OpenParm));
if Res then Exit;
DeviceID := OpenParm.wDeviceID;
try
Res := mciSendCommand(DeviceID, MCI_SET, MCI_SET_DOOR_CLOSED, 0);
if Res = 0 then Exit;
Result := True;
finally
mciSendCommand(DeviceID, MCI_CLOSE, Flags, Longint(@OpenParm));
end;
end;
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