DELPHI操縱聲卡(2)

獲得和控制音量

unit uMain;
interface
uses
Windows
Messages
SysUtils
Classes
Controls
Forms
Dialogs
ExtCtrls
StdCtrls
mmsystem; //You must add this in the uses line
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
{ Private declarations }
public
myvolume: array[0..10] of longint;
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
var
Count
i: integer;
begin
Count := auxGetNumDevs;
for i := 0 to Count do
begin//The i is the device: I.E. 0=Wav Volume
auxgetvolume(i
addr(myvolume[i])); //Gets the values that the user has set
auxsetvolume(i
longint(9000)*65536+longint(9000)); //Sets the volume very very low
end; //The reason for the 9000*65536 + 9000 is if you wanted to do left and right channels
end;
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
var
Count
i: integer;
begin
Count := auxGetNumDevs;
for i := 0 to Count do
begin
auxsetvolume(i
myvolume[i]); //Sets the volume back to the users old settings
end;
end;