private void butChangePat_Click(object sender, EventArgs e)
        {
            Patient pat = Patients.GetLim(patNum);          //doesn't return null
            FormEhrPatientSelectSimple FormP = new FormEhrPatientSelectSimple();

            if (String.IsNullOrEmpty(pat.LName) && String.IsNullOrEmpty(pat.FName))
            {
                //patient could not be located by patnum, so use parsed name
                FormP.LName = lName;
                FormP.FName = fName;
            }
            else
            {
                FormP.LName = pat.LName;
                FormP.FName = pat.FName;
            }
            FormP.ShowDialog();
            if (FormP.DialogResult != DialogResult.OK)
            {
                return;
            }
            patNum = FormP.SelectedPatNum;
            FillPatAndGrid();
        }
		private void butChangePat_Click(object sender,EventArgs e) {
			Patient pat=Patients.GetLim(patNum);//doesn't return null
			FormEhrPatientSelectSimple FormP=new FormEhrPatientSelectSimple();
			if(String.IsNullOrEmpty(pat.LName) && String.IsNullOrEmpty(pat.FName)) {
				//patient could not be located by patnum, so use parsed name
				FormP.LName=lName;
				FormP.FName=fName;
			}
			else {
				FormP.LName=pat.LName;
				FormP.FName=pat.FName;
			}
			FormP.ShowDialog();
			if(FormP.DialogResult!=DialogResult.OK) {
				return;
			}
			patNum=FormP.SelectedPatNum;
			FillPatAndGrid();
		}