[droguerman]

en el dll

Código Delphi [-]
function devolverFrame(aOwner : longint): longint; stdcall;
begin
  result :=  longint(Tframe.create(TComponent(aOwner)));
end;

en tu forma:

Código Delphi [-]
constructor TMiForma.create(aOwner : TComponent);
var
  oFrame : TFrame;
begin
  oFrame := TFrame(devolverFrame(longint(self));
  oFrame.parent := self;
  oFrame.color := clRed; //para que lo veas
  oFrame.width : =150;
  oFrame.height : =150;
  oFrame.visible := true;
end;

saludos