Get notified: CD in/out

Need to know when the user inserts/extracts a CD?

There's a message you can intercept to know this: WM_DEVICECHANGE
so... the rest is easy on the private section of your form, declare the function:

Private
{ Private declarations }
procedure WMDeviceChange(var Msg: TMessage); message WM_DEVICECHANGE;
the implement it:
procedure TForm1.WMDeviceChange(var Msg: TMessage);
const
CD_IN = $8000;
CD_OUT = $8004;
begin
inherited;
case Msg.wParam of
CD_IN: ShowMessage('CD in'); //or do whatever you want!!
CD_OUT: ShowMessage('CD out')
end
end;

that's it... you'll receive a message when you put a CD in/out... try it then just instead of showing 'CD in'/'CD out'... do whatever you want