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var
  Form1         :TForm1;
  temp          :tbitmap;
  x,y,u,v       :array [0..2000] of single;
  grad          :single;
  scl           :array [0..2000] of byte;                    

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procedure TForm1.FormCreate(Sender: TObject);
var i:word;
begin

// Erstmal das canvas und die bitmap auf die Größe des Bildschirms anpassen
form1.canvas.create;
form1.top       := 0;
form1.left      := 0;
form1.width     := screen.width;
form1.height    := screen.Height;

temp            := tbitmap.create;
temp.width      := form1.width;
temp.height     := form1.height;
temp.pixelformat:= pf1bit;
// 1bit deswegen, da Schnee ja eh nur weiß ist

for i := 0 to 2000 do
// 2.000 Schneeflocken
        begin
        x[i]    := random(screen.width);
        y[i]    := random(screen.height) - screen.height;
        u[i]    := random(360);
        v[i]    := (20 + random(50)) / 20;
        scl[i]  := random(2) + 1;
        end;
end;                    

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procedure TForm1.Timer1Timer(Sender: TObject);
var 
i:word;
offset:single;
begin

temp.canvas.brush.color := 0;
temp.canvas.pen.color   := 16777215;
temp.canvas.fillrect (rect(0,0,screen.width,screen.height));
temp.canvas.brush.color := 16777215;

grad := grad + 3;

for i := 0 to 2000 do
        begin
        offset := sin(degtorad(grad+u[i])) * 5;
        y[i] := y[i] + v[i];
        if y[i] > screen.height then y[i] := y[i] - screen.height;
        // ich vermute ja das diese Zeile alles so langsam macht
        temp.canvas.fillrect (rect(     round(x[i] + offset),
                                        round(y[i]),
                                        round(x[i] + scl[i] + offset),
                                        round(y[i] + scl[i]))   );
        end;
form1.canvas.draw (0,0,temp);
form1.top := not(form1.top);
end;                    

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c := TCanvas.Create;
c.Handle := getDC(0);

c.TextOut(200,200,'runs');