Delphi 2009 有了pngimage、GIFImg 单元, 可以直接使用 png 和 gif 图片了;

如果是设计时给 TImage 装载 png 图片, Delphi 会自动调用 pngimage 单元完成加载, 那动态调用呢?

当然首先要uses pngimage, 然后:
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unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, pngimage;

type
TForm1 = class(TForm)
Image1: TImage;
procedure FormCreate(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
PngBit: TPngImage;
begin
PngBit := TPngImage.Create;
PngBit.LoadFromFile('c:\temp\test.png');
Image1.Picture.Graphic := PngBit;
PngBit.Free;
end;

end.