How to make stdout redirected in WinAPI and stderr go nowhere?

Question

Programming

I want to run a program through WinAPI channels that slightly "shit" in stderr. Therefore, I want the stderr stream to go nowhere, and stdout to a named pipe.
There is one bit in the STARTUPINFO structure - STARTF_USESTDHANDLES. Is it possible to make one of these three descriptors be null, or the buffer emptied on overflow, or something else - but only so that the program does not stop if the buffer overflows?
REPEAT FOR SYS ADMIN. Programming! Windows API! CreateProcess!
I know what 2>nul is. And what admin replaced “medium” complexity with “simple”: WinAPI is, in principle, not a trivial thing.

Answer 1

What language?
In C#, this is much easier to do, without the Win32API at all.
On the pluses, we look at the STARTUPINFO structure

typedef struct _STARTUPINFO {
  DWORD  cb;
  LPTSTR lpReserved;
  LPTSTR lpDesktop;
  LPTSTR lpTitle;
  DWORD  dwX;
  DWORD  dwY;
  DWORD  dwXSize;
  DWORD  dwYSize;
  DWORD  dwXCountChars;
  DWORD  dwYCountChars;
  DWORD  dwFillAttribute;
  DWORD  dwFlags;
  WORD   wShowWindow;
  WORD   cbReserved2;
  LPBYTE lpReserved2;
  HANDLE hStdInput;
  HANDLE hStdOutput;
  HANDLE hStdError;
} STARTUPINFO, *LPSTARTUPINFO;

Be sure to set STARTF_USESTDHANDLES in dwFlags
After calling CreateProcess in hStdInput, hStdOutput and hStdError receive pointers to the corresponding streams.

Answer 2

prog.exe 2>nul

Answer 3

stderr stream went nowhere

2>NUL

WinAPI is, in principle, not a trivial thing.

Maybe, but the detailed description is stdin, stdout, stderr .