Flow Control with Exception Handling

I'm using exception handling to catch errors, but cannot figure out how to prevent the code after the exception from executing. Example: try Statement 1 catch Error handling for Statement 1 Statement 2 Statement 3 If there is an error with Statement 1 (in this case a null value in a text box), I don't want Statements 2 & 3 to execute since they rely on a valid value. Also Statements 2 & 3 deserve their own try...catch statements. So, I am left with a hugely nested set of try...catches to handle flow control. I know this is not correct. How should I handle it? Thanks, Scott