SDK Render layer as is

Hi

I have a c++ effect which I'm only using for settings. I would like to be able to add it to a layer and nothing on the layer will change visually. Kind of like a Slider Exp Control, but with more settings.

What would be the simpliest and most processor friendly way of doing that?

I tried to simply not call any prerender and smart render function and leave the render function empty like this. Makes the layer disapear or scrambled.

static PF_Err	
Render(	PF_InData		*in_data,
		PF_OutData		*out_data,
		PF_ParamDef		*params[],
		PF_LayerDef		*output)
{
	PF_Err	err	= PF_Err_NONE;

	AEGP_SuiteHandler	suites(in_data->pica_basicP);

	return err;
}

Should I still use the iterate function?

Thanks,

Jakob