I don't use wxSmith since i don't use wxWidgets for my projects.
If you say that wxSmith does write the files like the better known IDE's then its fine by me.
My point was more to have it embedded inside code::blocks

Let's say the red parts are wxSmith but then as C::B plugin.
Then if you add/modify/delete stuff it updates instantly inside C::B
It could be also done with parsing class and analyzing it's content but it's really hard to do - If You don't believe just read some articles on C++ parsing.
I know this will be hard but that's not what i ment.
Borland uses .dfm files. These files only contain the class instance details like width, height, position, method assignments and children.
object Form1: TForm1
Left = 192
Top = 107
Width = 696
Height = 480
Caption = 'Form1'
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'MS Sans Serif'
Font.Style = []
OldCreateOrder = False
PixelsPerInch = 96
TextHeight = 13
object Label1: TLabel
Left = 8
Top = 40
Width = 32
Height = 13
Caption = 'Label1'
end
object Button1: TButton
Left = 8
Top = 8
Width = 75
Height = 25
Caption = 'Button1'
TabOrder = 0
OnClick = Button1Click
end
end
Something similar to that inside c::b would eliminate the overwrite when you change something inside the RAD.
Since the only thing that has to be done is lookup the .c/.h files if the new method, for example, exists or has to be created.
The content of this .dfm file is nothing more then an easy layout of the class constructor or main() function.
It's not something i will use today but when i started coding for the first months this kind of RAD development as provided by Borland just realy made it easy for me to start developing since i didn't have to care how to create a window and put a button on it.
The other benefit was that i wrote it all in one go thru a single IDE without having to worry about loading and saving the correct version of a file between several applications.
So if wxSmith/fluid are available as C::B plugins it would make this IDE very popular for starters.