Enregistrer ses propres formats de fichiers

//Use the registry to register your own filetype.
uses registry;

procedure TForm1.RegisterFileType(prefix:String; exepfad:String);
var
reg:TRegistry;

begin
reg:=TRegistry.Create;
reg.RootKey:=HKEY_CLASSES_ROOT;
//create a new key --> .pci
reg.OpenKey('.'+prefix,True);
//create a new value for this key --> pc if ile
reg.WriteString('',prefix+'file');
reg.CloseKey;
//create a new key --> pc if ile
reg.CreateKey(prefix+'file');
//create a new key pc if ileDefaultIcon
reg.OpenKey(prefix+'fileDefaultIcon',True);
//and create a value where the icon is stored --> c:project1.exe,0
reg.WriteString('',exepfad+',0');
reg.CloseKey;
reg.OpenKey(prefix+'fileshellopencommand',True);
//create value where exefile is stored --> c:project1.exe "%1"
reg.WriteString('',exepfad+' "%1"');
reg.CloseKey;
reg.Free;
SHChangeNot if y(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nil, nil);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
RegisterFileType('pci','c:project1.exe');
end;