How do I show the print dialog when printing an excel sheet

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C#

.NET

In my Food pantry program, I have a form that lists all the sheets in the excel workbook. When a sheet is selected, I want to show the print dialog before printing a sheet, this is so fit-to-sheet can be selected.

My current code is

 private void cmdPrintSelected_Click(object sender, EventArgs e)
{
        for (int i = 0; i < clbSheetList.Items.Count; i++)
        {
            if (clbSheetList.GetItemChecked(i) == true)
            {
                Excel.Worksheet ws =                 (Excel.Worksheet)frmFoodPantry.theWorkbook.Worksheets[i + 2];
                printSheets(ws);
            }
        }
}

This will print the selected sheet ok, using the default printer, but I would like to give the user the change to select a different printer.

What I have tried:

I have tried the solution in Microsoft Answers.
and

frmFoodPantry.theWorksheet.PageSetup.Zoom = false;
frmFoodPantry.theWorksheet.PageSetup.FitToPagesWide = 1;
//frmFoodPantry.theWorksheet.PageSetup.FitToPagesTall = 1;
frmFoodPantry.theWorksheet.PageSetup.Orientation = Microsoft.Office.Interop.Excel.XlPageOrientation.xlLandscape;
frmFoodPantry.theWorksheet.PageSetup.PaperSize = Microsoft.Office.Interop.Excel.XlPaperSize.xlPaperA4;
printSheets(ws);

I have tried to set the zoom to 50 and commenting out the fitopageswide and tall. The results are the same.