Connect to Origin and start a new project with a single worksheet and optionally plot all the columns in a graph.
DF_NO_CHANGE =-1 DF_DOUBLE =0 DF_TEXT =1 DF_TIME = 2 DF_DATE = 3 DF_TEXT_NUMERIC = 9 DF_FLOAT = 32 DF_SHORT = 33 DF_LONG =34 DF_CHAR =35 DF_BYTE = 38 DF_USHORT = 39 DF_ULONG =40 DF_COMPLEX = 41
The default value is DF_DOUBLE.