step1.pas

职工信息管理系统的源代码

unit step1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls, StdCtrls;

type
  Tstep = class(TForm)
    ProgressBar1: TProgressBar;
    procedure FormPaint(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  step: Tstep;

implementation

{$R *.dfm}

procedure Tstep.FormPaint(Sender: TObject);
var a,b:real;
i:integer;
begin
a:=clientheight/256;
b:=0;
for i:=255 downto 0 do
begin
canvas.Brush.Color:=$000000000+i*$10000;
canvas.FillRect(rect(0,round(b),clientwidth,round(a+b)));
b:=b+a;
end;
end;

end.