Color problems

[Stefan Jeske <jeske braunschweig netsurf de>]

Hi !

I have chosen a color with the color selection dialog, and now
I want to set the background of a list box to that color. But how ?
I have 3 RGB values r, g and b, and if I try

  GdkColor color;
  
  color.red   = r * 65535.0;
  color.green = g * 65535.0;
  color.blue  = b * 65535.0;
  gdk_color_alloc (gtk_widget_get_colormap (mainwin), &color);

  gdk_window_set_background (my_list_box->window, &color);

nothing happens. What's wrong ?

I guess I need a fundamental introduction to colors, colormaps etc. ... ;)

Ciao,
  Stefan