Beckhoff TwinCat Structure Initialisation

Hi,

I am pretty new to this game so just getting my head around it all.

I have a program written in Beckhoff's TwinCat PLC control program. We are using PC based automation.

My issue is I have this structure declared:

TYPE T_GPGGA :
STRUCT
    sUTC            :STRING(9);
    sLat            :STRING(7);
    sLatDirection   :STRING(1);
    sLong           :STRING(7);
    sLongDirection  :STRING(1);
    sGPSQuality     :STRING(1);
    sNumSats        :STRING(1);
    sHDOP           :STRING(4);
    sAltitude       :STRING(6);
    sGeodSep        :STRING(6);
    sDiffAge        :STRING(5);
    sDiffStationID  :STRING(4);
END_STRUCT
END_TYPE

Now I want to make a global variable (ideally a global constant) of type T_GPGGA and assign values to each string within the structure.

I realise now it could have been done with an array, but that would require changing a bunch of code (which I will probably do in a while), but just interested to know if I can assign values when creating an instance of a structure, or only when I define the type.

Thanks Steve