This field allows you to specify a block of existing lines of text to be protected from change. This is particularly useful in a rigorous transaction environment where your application encourages the use of comments but rightly makes it difficult for anyone to remove previously entered comments. Another possibility is to use this feature as a way of protecting a few header lines of text which instruct the user how text should be entered. If you set TXC.PROTROWS to a positive number, it protects that many lines, starting from the top. If you set it to a negative number, it protects all but a certain number of lines at the bottom: -1 protects all lines, -2 protects all but the last line, -3 all but the last two lines, etc.
