Writing Portable Applications

Use the following guidelines for writing LUA applications that are portable to other environments:

• Use the symbolic constant names for parameter values and return codes, not the numeric values shown in the WINLUA.H file. (See the WINLUA.H file in the Microsoft® SNA Server Software Development Kit for more information.)
• When accessing SNA sense codes in a data buffer, use the symbolic constants rather than the numeric values; this ensures that the byte storage order is correct for your particular system. You should use memcpy to set the values, and memcmp to test them. For example:

  memcpy (this_verb.common.lua_data_ptr, LUA_INCORRECT_REQ_CODE, 4);
  if (memcmp (this_verb.common.lua_data_ptr,
  LUA_INCORRECT_REQ_CODE, 4) == 0)
  {
  .....
  }

• Ensure that any parameters shown as reserved are set to zero.
• Set the lua_verb_length parameter as described in the verb description.