Mega Code Archive
How can I change the volume
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Title: How can I change the volume ?
Question: How can I change the volume ?
Answer:
procedure SetVolume(X: Word);
var
iErr : Integer;
i: integer;
a: TAuxCaps;
begin
for i := 0 to auxGetNumDevs do begin
auxGetDevCaps(i,Addr(a),SizeOf(a));
If a.wTechnology = AUXCAPS_CDAUDIO Then break;
end;
// Sets volume equally for left and right channels.
// VOLUME := LEFT*$10000 + RIGHT*1 (or the other way? :)
iErr:=auxSetVolume(i,(X*$10001));
if (iErr0) then ShowMessage('No audio devices are available!');
end;
function GetVolume: Word;
var
iErr : Integer;
i: integer;
a: TAuxCaps;
vol: word;
begin
for i := 0 to auxGetNumDevs do begin
auxGetDevCaps(i,Addr(a),SizeOf(a));
If a.wTechnology = AUXCAPS_CDAUDIO Then break;
end;
iErr:=auxGetVolume(i,addr(vol));
GetVolume := vol;
if (iErr0) then ShowMessage('No audio devices are available!');
end;
You'll have to modify AUXCAPS_CDAUDIO to whatever suits (check out available values via the Ctrl+Space shortcut in Delphi)
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