title: Create a new component compatible with VCL and FMX
body: <p>I'm doing some components and I want to do them compatibles for VCL and FMX. So I have a structure that follows this pattern:</p>
  
  <p>General_dpk (with TCustomMyClass) + VCL_dpk (with TMyClass) + FMX_dpk (with TMyClassFMX)</p>
  
  <p>Each package have their register procedure that registered their components. In the components palette appears both components (VCL and FMX). How to do that only appears the components according the type of project selected (VCL or FMX) like the others Delphi components?</p>
  
  <p>Thanks</p>