Write a program using 'While Loop' that will accept 7 integers from user within the range of 7 to 70 and will calculate Sum of all the inputted numbers. If the user enters any other value within 100 (inclusive) that doesn't fall into the range of 7-70 (inclusive), an appropriate error message should be shown and the program should ask for an input again. However, if the inputted value exceeds 100, the program should terminate without asking for any other input from the user. 

Attach the clear screenshots showing the complete code for each of the programs. Also, summary of each the key steps are also required.