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* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
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curl_mime_headers - set a mime part's custom headers #include <curl/curl.h> "CURLcode curl_mime_headers(curl_mimepart * " part , "struct curl_slist * " headers ", int " take_ownership ");" curl_mime_headers(3) sets a mime part's custom headers. part is the part's handle to assign the custom headers list to. headers is the head of a list of custom headers; it may be set to NULL to remove a previously attached custom header list. take_ownership: when non-zero, causes the list to be freed upon replacement or mime structure deletion; in this case the list must not be freed explicitly. Setting a part's custom headers list twice is valid: only the value set by the last call is retained. As long as at least one of HTTP, SMTP or IMAP is enabled. Added in 7.56.0. CURLE_OK or a CURL error code upon failure.

 struct curl_slist *headers = NULL;

 headers = curl_slist_append(headers, "Custom-Header: mooo");

 /* use these headers, please take ownership */
 curl_mime_headers(part, headers, TRUE);

 /* pass on this data */
 curl_mime_data(part, "12345679", CURL_ZERO_TERMINATED);

 /* set name */
 curl_mime_name(part, "numbers");

curl_mime_addpart "(3)"