Thanks...  

On the form I found a property called RegistryRepositoryKey

I put this value HKEY_LOCAL_MACHINE\SOFTWARE\teste

Then i went to the register and create that key "teste" (test for u texan people)

I put that on the form_load method:

Me.Width = RegistryRepository1.ReadInt32((Me.RegistryRepositoryKey), "form1_width", 5)

Then, 5 new values appear: SF_FormHeight, SF_FormState, SF_FormWidth, SF_FormX, SF_FormY and the best is that it works, after running the solution and moves the form to a diferent place on a screen, it saves diferent values, and after running again, the form starts in the previous position.

So far, so good, all okidoki, but that makes me thought.. I need to create a key for every form. If the aplication is going to run on my machine only.. ok.. but.. it's not.. so after all that here comes the question:

Is that a way, maybe inside a "if ... then" code to check if the key already exists? if not:

let the form auto create the key, maybe with HKEY_LOCAL_MACHINE\SOFTWARE\teste\My Form Name or Text ?

if this is easy to write? Please post here, if not forget, i do not want to take your time...

Thanks.