using IronPrint;

// Set the paper size to A4
PrintSettings printSettings = new PrintSettings();
printSettings.PaperSize = PaperSize.A4;

Printer.Print("report.pdf", printSettings);

Imports IronPrint

' Set the paper size to A4
Dim printSettings As New PrintSettings()
printSettings.PaperSize = PaperSize.A4

Printer.Print("report.pdf", printSettings)