if (is_showing == 0) {

In XP, if I wanted to copy what is inside the parenthesis to another section of the code, I simple select "is_showing == 0" and ctrl-drag to copy.  With Win7, I cannot select this.  Instead the mouse skips to select "is_showing == 0) ", including the unbalanced right parenthesis.

Actually, I think XP WordPad does the same thing but you can turn off this behavior under view:optiions:options:Automatic_word_select.  Under Win 7, the option is missing and you are forced to use Automatic Word Select.  For me, that breaks the usefulness of being able to drag and drop text if I have to clean up what is dragged (especially if I am copying to more than one destination).

In other contexts, it would be snarky to point out that WordPad has bulked up from 211 KB under XP to 4,145 KB with what now looks like a required 190 KB DLL.  But an approximate 20X (!) growth in size while eliminating a most useful feature just seems like bloat.

Fortunately, you can run XP WordPad under Windows 7.

You might think that you can simply overwrite the WordPad EXE file with the older XP version. Alas, that is difficult. Windows protects exe files and you need special permission (beyond being an admin) to overwrite the system version.  This seems a useful system protection and I did not investigate how to override this protection.  There also seems to be protection for some registry entries because one change to overwrite via registry redirection seems to have been backed out automatically on reboot

Instead, I have the XP version of WordPad on a separate path under the file name wp_xp.exe and simply set file associations to open with wp_xp.exe.  In setting the file association for opening, Windows does continue to identify the program as WordPad (not its file name of wp_xp.exe) but I can tell them apart because each version has its own icon.