try code like this
DECLARE Integer SQLConfigDataSource in odbccp32 ;
Integer, Integer, String, String
local lnSuccess
if tlModify
lnSuccess = SQLConfigDataSource(0, ODBC_CONFIG_DSN, tcDriverName, tcSettingString)
else
lnSuccess = SQLConfigDataSource(0, ODBC_ADD_DSN, tcDriverName, tcSettingString)
endif

But more is involved.. you need to set registry settings.