public static void Main()
{
string owner_passwd = "owner";
string user_passwd = "";
string text = "User cannot print and copy this document.";
Console.WriteLine("libhpdf-" + HPdfDoc.HPdfGetVersion());
try {
HPdfDoc pdf = new HPdfDoc();
/* create default-font */
HPdfFont font = pdf.GetFont("Helvetica", null);
/* add a new page object. */
HPdfPage page = pdf.AddPage();
page.SetSize(HPdfPageSizes.HPDF_PAGE_SIZE_B5,
HPdfPageDirection.HPDF_PAGE_LANDSCAPE);
page.BeginText();
page.SetFontAndSize(font, 20);
float tw = page.TextWidth(text);
page.MoveTextPos((page.GetWidth() - tw) / 2,
(page.GetHeight() - 20) / 2);
page.ShowText(text);
page.EndText();
pdf.SetPassword(owner_passwd, user_passwd);
pdf.SetPermission(HPdfDoc.HPDF_ENABLE_READ);
/* use 128 bit revision 3 encryption */
pdf.SetEncryptionMode(HPdfEncryptMode.HPDF_ENCRYPT_R3, 16);
/* save the document to a file */
pdf.SaveToFile("Permission.pdf");
} catch (Exception e) {
Console.Error.WriteLine(e.Message);
}
}