===============
VDKColorBrowser
===============
usage:


VDKColorBrowserParms parms;

parms.title = "color browser window title";
parms.ok = "ok button caption";
parms.cancel = "cancel button caption";
parms.loadvdk = "load vdk defaults button caption";
parms.loadrgb = "load rgb button caption";

VDKColorBrowser* child = new VDKColorBrowser(this, &parms);
child->Setup();
child->ShowModal();

// if user pressed cancel rgb.red,rgb.green,rgb.blue are left to -1
if(parms.rgb.red >= 0)
  {
    printf("\nselected color: VDKRgb(%d,%d,%d)",
	   parms.rgb.red,parms.rgb.green,parms.rgb.blue);
    fflush(stdout);
  }