[Form in BPL]

Hello,
I'm trying to dynamically create forms stored in a bpl. But to create them they are opening in vcl mode.

I'm calling the following function within the bpl to create the form.

function RegisterPkg(sAWidth,sAHeight: Integer; gUniMainModule : TuniGUIMainModule; 
gUniApplication : TUniGUIApplication):TGenericProgram;
begin
...
      pkgProgram.FfrmMain := TUniForm( gUniMainModule.GetFormInstance(TfrmMyForm,true) );

      if pkgProgram.FfrmMain.WebMode then
        ShowMessage('web')
      else
      if pkgProgram.FfrmMain.VCLMode then
        ShowMessage('vcl');

...

end;

I wonder if I'm doing the right way or what would be the mode to create them in web mode and not in vcl.