Wrapper for the Excel12 function that allows passing D arrays
D version of Excel12f. "D version" in the sense that the types are all D types. Avoids having to manually convert to XLOPER12. e.g. excel12(xlfFoo, 1.0, 2.0);
Version of excel12 that avoids automatic memory management by asking the caller to supply a compile-time function to call on the result.
Will free any malloc'd memory associated with the given LPXLOPER, assuming it has any memory associated with it
Utility functions for writing XLLs