Read the error message:
'Context' is not a member of 'ASP.processinput_aspx'
It explains exactly what the problem is. You are trying to use a property, field, delegate, or method of
ASP.processinput
called
Context
and it isn't defined, or it's defined in a different class altogether.
Start by looking at your code and find every location where you use "Context". Then check what you expected to use, and if it should be a part of the class that you spelled it correctly.
And dumping your HTML file on us for a VB error isn't helpful at all, given that it's a VB code error ... So look in your VB code file, we can't do that for you!