用 GDI 操作 EMF 文件[2]: PlayEnhMetaFile、DeleteEnhMetaFile

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
const
Path = 'C:\Temp\MyMetaFile.emf';
var
MetaFileDC: HDC;         {EMF 画布句柄}
HMetaFile: HENHMETAFILE; {EMF 文件句柄}
begin
MetaFileDC := CreateEnhMetaFile(0, PChar(Path), nil, nil);
Ellipse(MetaFileDC, 10, 10, 100, 60);
HMetaFile := CloseEnhMetaFile(MetaFileDC);

{在窗体上按原始大小绘制 EMF}
PlayEnhMetaFile(Canvas.Handle, HMetaFile, Rect(10,10,100,60));

DeleteObject(MetaFileDC);
DeleteEnhMetaFile(HMetaFile);
end;

end.