Need Help with Tool Wear Macro

[BGies]

I'm using UCCNC on a surface grinder. The axis on the machine are as follows...
Y - Grinding wheel moves +UP and -DOWN.
X - table reciprocates left and right
Z - table moves forward and back.
I'd like to construct the programs so all Grinding work is done on G54, and all wheel dressing is performed on G55.
When dressing a grinding wheel, I'd like to update the Y axis on both coordinates. For example, if I remove .001" off the bottom of the wheel, I'd like the Y axis on G54 and G55 to update accordingly.
I was able to create a very basic macro yesterday that updates the work offset..
exec.ChangeaxisDROvalue( 1, “.001”);
The 1 represents the Y axis. The .001 updates the Y axis Work Offset on the selected coordinate system. This is a step in the right direction for me because I'm not using a G92 temporary offset.
I have no experience writing macros. How can I create an improved macro that will update the Y axis on both coordinate systems? The amount of material removed off the bottom a grinding wheel can change depending on the application and wheel wear. I'd like to store that number as a variable, and then update the Offsets using the variable.