Set the first column's color to green. The first column to be set up is column number 4.
call send(gddvecid, '_setIndex', 1);
collst1 = makelist();
rc = insertn(collst1, 4, -1);
call send(gddvecid, '_setColumn', collst1);
call send(gddvecid, '_setColor', 'green');