(C#) Create a WinZip/7-Zip compatible AES Encrypted Zip

Creates a WinZip compatible AES-encrypted .zip archive

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

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

bool success = zip.NewZip("/myZipDir/aes.zip");
if (success != true) {
    Debug.WriteLine(zip.LastErrorText);
    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 = true;
success = zip.AppendFiles("c:/temp/a/*",recurse);
if (success != true) {
    Debug.WriteLine(zip.LastErrorText);
    return;
}

// Create the encrypted zip ("/myZipDir/aes.zip")
// The path of the zip is what was originally passed
// to the NewZip method (above).  
bool success = zip.WriteZipAndClose();
if (success != true) {
    Debug.WriteLine(zip.LastErrorText);
    return;
}

Debug.WriteLine("Created AES Encrypted Zip.");