Xceed Zip for COM/ActiveX on x86/x64 Documentation
Xceed Zip control reference / Xceed Zip control enumeration types / xcdTextEncoding enumeration
xcdTextEncoding enumeration

xcdTextEncoding
{
xteStandard   = 0,
xteUnicode    = 1,
}

This enumeration is used by the TextEncoding property. Explanations on each parameter can be found in that property's help topic.