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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls;
type
TForm1 = class(TForm)
Timer1: TTimer;
procedure FormCreate(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
Const
WS_EX_LAYERED = $00080000;
LMA_COLORKEY = $00000001;
LMA_ALPHA = $00000002;
var
Form1: TForm1;
Step: integer;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
var
ExtStyle : LongInt;
begin
Step:=255;
ExtStyle := GetWindowLong(Handle, GWL_EXSTYLE);
SetWindowLong(Handle, GWL_EXSTYLE, ExtStyle or WS_EX_LAYERED);
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
if Step>0 then
begin
Step:=Step-10;
SetLayeredWindowAttributes(Handle, RGB(0,0,0), Step, LMA_ALPHA or LMA_COLORKEY);
end else
begin
SetLayeredWindowAttributes(Handle, RGB(0,0,0), 255, 1);
Timer1.Enabled:=False;
end;
end;
end.
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