Sets the value to a .NET Guid by passing in either a GUID string, a ComGuid object, or a null (which creates a new Guid).

This method isn't really necessary as you can never effectively get a Guid reference into FoxPro. Instead always use InvokeMethod() or GetProperty() to retrieve Guid values which are then returned as ComValue instances you can call GetGuid() on.

o.ComValue.SetGuid(object value)