[Mingw-users] richedit.h SETTEXTEX missing

[Robert W. <rwi...@sh...>]

richedit.h has

#define EM_GETTEXTEX (WM_USER+94)

but

#define EM_SETTEXTEX (WM_USER+97)

and

typedef struct _settextex {DWORD flags; UINT codepage;} SETTEXTEX;

are missing.

Could someone point me to an explanation of what is required to add missing entries to the MinGW32 headers? I am willing to devote
some time to do this for the project if I can get a description of the legal method and documentation required. From reading several
posts the PSDK documentation is not sufficient. What documentation is required?

Robert Wishlaw