WaveformGraphDesigner not found

[antpema]

Hello, I want to get the WaveformGraphDesigner in the following way: DesignerHost.GetDesigner(type), and it works in a computer where NationalInstrument is in GAC (Global Assembly Cache). However, if it isn't in GAC and I place National Instrument dlls in bin folder, DesignerHost.GetDesigner(type) returns null, probably because the necessary dll is not found. Which is the assembly where WaveformGraphDesigner is placed?

Thank you.