help me plase in nnprtool in Matlab for number recognition

I need your help I have to know how to use nnprtool in Matlab (neural network) for number recognition; the main problem is that I don't have any idea about matlab :(

I searched a lot, but I did not understand

Can you help me please?

If I have an image that contains the numbers , how can I use it as input to the tool?

thank u very much