Subject: What is the difference between transcriptional factors and growth factors?

I understand that transcriptional factors affect the transcription of target 
genes and decide which protein to make and when.
Whereas growth factors like oestrogen affect the RATE of transcription and cell 
division.
Do proto-oncogenes produce these growth factors?
I think that transcriptional factors operate using the second messenger model 
but do growth hormones use this mechanism too when they are produced by the 
proto-oncogenes to stimulate cell division?

Any help would be greatly appreciated, I'm really confused :s

Many thanks 
Salman

Re: What is the difference between transcriptional factors and growth factors?