Excel VBA Code to Lock Data Cells after running the macro result

I have got an worksheet where I process some data to get results in the sheet thru Excel VBA Macro (Button click()).
After the Results are shown in the same worksheet, I wish the data should not get modified and protected till "Reset"
the results as 0.
I need the VBA code for locking the Data cells from d4:d8 (Data Cells). I am verymuch new to VBA for writing codes.

Thanks

Thank u for ur reply.
I will try it.