private void m_fProperties_ShowHelpChartField(out bool cancel, TextBox ctrl, int idx) {
int nIndex = 0;
int nFieldType = 0;
String sField = "";
sField = ctrl.Text;
nFieldType = m_fProperties.getChartFieldType(idx);
nIndex = m_fProperties.getChartIndex(idx);
cancel = !cGlobals.showDbFields(sField, nFieldType, nIndex, this);
if (cancel) { return; }
ctrl.Text = sField;
m_fProperties.setChartFieldType(idx, nFieldType);
m_fProperties.setChartIndex(idx, nIndex);
}