I dislike Visual Studio, but want to make a GUI application. I used to use ResEdit to design GUIs, but whenever I use the units (that come up in the C++ code example) in Code::Blocks (bare C++ code), the compiled GUI runs, but the controls are all out of whack. Do I have to convert pixels to device units or something?
Other way round. ResEdit uses Device Coordinates to create the dialogues, so they will need to be converted to pixels (which C uses within creating the Dialogues by hand). However, it is normally much easier to simply use the resource files generated by ResEdit and include that within your project, and then simply create the dialogues from those resources.
personally i like using qt because its cross platform and qt creator brings a nice balance between interface design and still being able to write the code (the linux build can be quite slow though (even the generated elf/exe) imo)