Yeah I remember using a “Dotfuscator” program for a couple of .net programs I created a few years back, using C#/.net you do need to worry about your code since it is so easy to reverse engineer.
But take a look on google and try and find a C++ decompiler that your average user will be able to afford… They are extremely expensive, and will not output a 1:1 reverse engineered copy of your code. There are a few free ones out there, but as noted, they just don’t work. The code that comes out of those programs is usually so garbled, hard to read, and incomplete that the average person would give up pretty quick.