HRESULT XPackageGetPackageKind(  
         _In_z_ const char* packageIdentifier,  
         _Out_ XPackageKind* kind  
)

XPackageKind kind;
HRESULT hr = XPackageGetPackageKind(packageIdentifier, &kind);
if (SUCCEEDED(hr) && kind == XPackageKind::PublisherContent)
{
    // Handle Publisher Content.
}