Hi all,
I added a new .cpp file in the ' ...\inkscape\src\ui\dialog ' directory. 

For reference I was using the fill-and-stroke.cpp for creating a GUI for my code. 
I named the tool say 'XYZ'. Upon compiling XYZ.cpp along with inkscape the following errors cropped up:

Make error line 301: problem compiling: src/ui/dialog/xyz.cpp:31:1:

error: 'XYZ' does not name a type.

Can someone help me in understanding why this cropped up ? 
I am deriving a class of the name XYZ under the UI->Inkscape->Dialog namespace. 

Also, in fill-and-stroke.cpp: 

FillAndStroke::FillAndStroke()

    : UI::Widget::Panel ("", "/dialogs/fillstroke", SP_VERB_DIALOG_FILL_STROKE),

      _page_fill(Gtk::manage(new UI::Widget::NotebookPage(1, 1, true, true))),

      _page_stroke_paint(Gtk::manage(new UI::Widget::NotebookPage(1, 1, true, true))),

      _page_stroke_style(Gtk::manage(new UI::Widget::NotebookPage(1, 1, true, true))),

      _composite_settings(SP_VERB_DIALOG_FILL_STROKE, "fillstroke", UI::Widget::SimpleFilterModifier::BLUR),

      deskTrack(),

      targetDesktop(0),

      fillWdgt(0),

      strokeWdgt(0),

      desktopChangeConn()

What do the highlighted text accomplish ?

--

demicoder