How can I turn an low power compliant monitor off?

Answer:

You can send a wm_SysCommand message with the WParam parameter set

to SC_MonitorPower and the LParam parameter set to 0 to turn the

monitor off, and -1 to turn the monitor back on. The following example

turns the monitor off for a 10 second interval.

Example:

type

TForm1 = class(TForm)

Button1: TButton;

Timer1: TTimer;

procedure FormCreate(Sender: TObject);

procedure Timer1Timer(Sender: TObject);

procedure Button1Click(Sender: TObject);

private

{ Private declarations }

public

MonitorOff : bool;

{ Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);

begin

Timer1.Enabled := false;

Timer1.Interval := 10000;

MonitorOff := false;

end;

procedure TForm1.Timer1Timer(Sender: TObject);

begin

if MonitorOff then begin

MonitorOff := false;

SendMessage(Application.Handle,

wm_SysCommand,

SC_MonitorPower,

-1);

Timer1.Enabled := false;

end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

MonitorOff := true;

Timer1.Enabled := true;

SendMessage(Application.Handle,

wm_SysCommand,

SC_MonitorPower,

0);

end;

------------------

//other source:

This code turns the monitor ON. Put this code into a button etc...:

SendMessage(Application.Handle, wm_SysCommand, SC_MonitorPower, -1) ;

This code turns the monitor into standby mode!:

SendMessage(Application.Handle, wm_SysCommand, SC_MonitorPower, 0) ;