Hello
@rogerthat
I did not use an agency, so I do not know if you must disclose your status in order to let them finish the paperwork or not. However, if you are doing the medical exam by yourself, I think the answer will be no (I may be wrong though).
I disclosed my status as soon as I started my medical examination, bringing my last CD4 and viral load results. However, they asked me for a medical report from my doctor. They also gave a sample: it included the date I started treatment (and which treatment it was, and, if I switched –not my case–, when and why), my cd4 and viral load records, a physical exam, and a prognosis. My results does not include any confidential information; it just states that I have done all the process, so do not worry about that. As far as I know the only person that must be aware of that is whoever is going to do the medical examination, and their Canadian counterpart at the embassy/consulate.
About the proof of funds, I did nothing, they did not ask me anything either. As an international student, many provinces will give you free treatment, but Ontario (I am there, so I know). However, there are other options to get it; in my case, the university offers international students an insurance that covers medication.
I hope I helped you.
Good luck!