I like the C/C++ code completion, but do not like it when it wants to replace things like "UCHAR" with "UCHAR_MAX". If I type "UCHAR", it pops up with "UCHAR_MAX", then if I hit the Tab key, which I always do after my data types, it inserts the replacement text automatically. I would like to turn off code completion for only certain items. Is this possible?

You can edit code completion files (files with *.lb extension) using GWD Text Editor. UCHAR_MAX is defined in the stdc.lb file, you should simply remove !UCHAR_MAX line.