Ok, Meppy than you !!

1) abot custom draw i've updated the code in Calendar.Draw event of your saple this way:

}
else if (start <= selStart && selEnd <= end)
{
// The selection is completely contained in the cell
g.FillRectangle(brush, b);

}
else if (selStart < start && start < selEnd)
{
// The selection starts before this cell and
// ends within this cell
g.FillRectangle(brush, b);

}
else if (selStart < end && end < selEnd)
{
// The selection starts within the cell and
// ends after the cell
g.FillRectangle(brush, b);

So now i drow a rectangle in all cell also in case of partial selection.

However when I create the item, the startdate and the end date are those of the  selection below the designed rectangle: how  can i set the selection snap  to all day?



2) After creating the item associated with all selected resource, if i move it to another resource (by dragging in the calendar control) obviusly it will be asociated only to resource that i've moved to. So: how can allow only the drag between dates and not between resources too?

Thanks a lot for your precious support!!