GridCtrl a;

a.AddColumn("Titre")
a.AddColumn("Deroulement").Ctrls<ProgressIndicator>();

gridDeroulement.GetCtrl(row,column).Set(actual,total);

With GridCtrl I have embedded well an "Option", but I do not know how to do it with ProgressIndicator.

a.AddColumn("Deroulement").Ctrls<ProgressIndicator>();

struct ProgressValue {
	int actual;	
	int total;
	
	ProgressValue(int _actual, int _total) 
		: actual(_actual), total(_total) {}
	operator Value() const { return RawToValue<ProgressValue>(*this); }
};

struct EmbeddedProgress : public ProgressIndicator
{
	virtual void SetData(const Value& data) {
		if (IsTypeRaw<ProgressValue>(data)) {
			const ProgressValue &pv = ValueTo<ProgressValue>(data);
			ProgressIndicator::Set(pv.actual, pv.total);
		}
		else
			return ProgressIndicator::SetData(data);
	}
};

gridctrl.Set(row, column, ProgressValue(actual, total));