Delphi Programming Implementation Popup, turn off CD-ROM drive

Source: Internet
Author: User

If you want to be a CD player, that's the trick. This is a way to control the pop-up and shutdown of the CD-ROM drive door, first you need to add MMSystem in the Uses section, then add two TButton buttons, write the following statement in the button event, remember that when the call is complete must show or Judge Returnstring, Otherwise the program will make an error:

procedure TForm1.Button1Click(Sender: TObject);
var returnstring:pchar;
mciSendString(set CDAudio door open, returnstring, 127, 0);
label1.Caption :=returnstring;
end; procedure TForm1.Button2Click(Sender: TObject);
var returnstring:pchar;
mciSendString(set CDAudio door closed, returnstring, 127, 0);
label1.Caption :=returnstring;

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