use FALSE instead of 0, in tut07
the .exe should be the same, but due to the timestamp difference git(gui) detects as different
use sizeof wc instead, even though it's the same thing
but in theory, if you change type of wc for an impossible reason, you then have to change the sizeof there
use the passed CmdShow param, else what's the point
the .exe after prev. changes, in tut08-2
tut09 use 512 only in one place
notify when more than buffer.size bytes were in the window, and thus they weren't all retrieved
ie. truncated
can set buffer size to 5 to test this, and obviously input 5 or more chars
use sizeof instead of 512, in tut10 also
fix tut11, non-zero is not: true
fix issue with opening About multiple times, and Tab not working on previously openned About windows
this one, will prevent opening more than one, else we'd have to keep track of all so we can
pass the relevant dialog handle to the IsDialogMessage else Tab-ing between controls won't work!
fix an error getting the extension when the file had none