Hi Peter,
The return value for "Version" should be same as your build - 21.1.80248
GetInfo() API returns the XML in string format. As you are receiving the value 1299 in an int variable, it seems that some XML parsing is being used.
Please check the XML string returned from the API before any parsing and confirm if it has the correct value for version.
You can also check executing the GetInfo() API with the suggested input XML's directly from LDK Toolbox to confirm if the returned value is correct. This should help to confirm if the problem is in implementation/parsing or somewhere else.
Regards,
Ashish