Create a WinZip compatible AES Encrypted Zip

Creates a WinZip compatible AES-encrypted .zip archive

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Chilkat.Zip zip = new Chilkat.Zip();

bool success;

//  Any string unlocks the component for the 1st 30-days.
success = zip.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    textBox1.Text += zip.LastErrorText + "\r\n";
    return;
}

success = zip.NewZip("/myZipDir/aes.zip");
if (success != true) {
    textBox1.Text += zip.LastErrorText + "\r\n";
    return;
}

//  Set properties to indicate that the Zip should be
//  AES encrypted.

//  A value of 4 indicates WinZip compatible AES encryption.
zip.Encryption = 4;

//  Key length can be 128, 192, or 256 bits.
zip.EncryptKeyLength = 128;

//  Set the password for AES encryption:
zip.EncryptPassword = "myPassword";

//  Add a directory tree to be zipped.  (The files
//  are not compressed at this point -- only references
//  to the files and directories are added to the zip object.)
bool recurse;
recurse = true;
success = zip.AppendFiles("c:/temp/a/*",recurse);
if (success != true) {
    textBox1.Text += zip.LastErrorText + "\r\n";
    return;
}

//  Create the encrypted zip ("/myZipDir/aes.zip")
//  The path of the zip is what was originally passed
//  to the NewZip method (above).

success = zip.WriteZipAndClose();
if (success != true) {
    textBox1.Text += zip.LastErrorText + "\r\n";
    return;
}

MessageBox.Show("Created AES Encrypted Zip.");