{"id":32753,"date":"2006-01-05T10:00:00","date_gmt":"2006-01-05T10:00:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/oldnewthing\/2006\/01\/05\/converting-between-lcids-and-rfc-1766-language-codes\/"},"modified":"2006-01-05T10:00:00","modified_gmt":"2006-01-05T10:00:00","slug":"converting-between-lcids-and-rfc-1766-language-codes","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/oldnewthing\/20060105-00\/?p=32753","title":{"rendered":"Converting between LCIDs and RFC 1766 language codes"},"content":{"rendered":"

\nOccasionally, I see someone ask for a function that\nconverts between LCIDs (such as 0x0409 for English-US)\nand RFC 1766 language identifiers (such as “en-us”).\nThe rule of thumb is, if it’s something a web browser would need,\nand it has to do with locales and languages,\nyou should look in\n\nthe MLang library<\/a>.\nIn this case, the\n\nIMultiLanguage::GetRfc1766FromLcid<\/a> method does the trick.\n<\/p>\n

\nFor illustration, here’s a program that takes US-English\nand converts it to RFC 1766 format.\nFor fun, we also convert “sv-fi” (Finland-Swedish) to an LCID.\n<\/p>\n

\n#include <stdio.h>\n#include <ole2.h>\n#include <oleauto.h>\n#include <mlang.h>\nint __cdecl main(int argc, char **argv)\n{\n HRESULT hr = CoInitialize(NULL);\n if (SUCCEEDED(hr)) {\n  IMultiLanguage * pml;\n  hr = CoCreateInstance(CLSID_CMultiLanguage, NULL,\n                        CLSCTX_ALL,\n                        IID_IMultiLanguage, (void**)&pml);\n  if (SUCCEEDED(hr)) {\n   \/\/ Let's convert US-English to an RFC 1766 string\n   BSTR bs;\n   LCID lcid = MAKELCID(MAKELANGID(LANG_ENGLISH,\n                        SUBLANG_ENGLISH_US), SORT_DEFAULT);\n   hr = pml->GetRfc1766FromLcid(lcid, &bs);\n   if (SUCCEEDED(hr)) {\n    printf(\"%ws\\n\", bs);\n    SysFreeString(bs);\n   }\n   \/\/ And a sample reverse conversion just for good measure\n   bs = SysAllocString(L\"sv-fi\");\n   if (bs && SUCCEEDED(pml->GetLcidFromRfc1766(&lcid, bs))) {\n    printf(\"%x\\n\", lcid);\n   }\n   SysFreeString(bs);\n   pml->Release();\n  }\n  CoUninitialize();\n }\n return 0;\n}\n<\/pre>\n
\nWhen you run this program, you should get\n<\/p>\n
\nen-us\n81d\n<\/pre>\n
\n“en-us” is the RFC 1766 way of saying “US-English”,\nand 0x081d is MAKELCID(MAKELANGID(LANG_SWEDISH,\nSUBLANG_SWEDISH_FINLAND), SORT_DEFAULT)<\/code>.\n<\/p>\n
\nIf you browse around, you’ll find lots of other interesting\nfunctions in the MLang library.\nYou may recall that earlier\n\nwe saw how to use MLang to display strings without those ugly boxes<\/a>.\n<\/p>\n
\nUpdate<\/b> (January 2008):\nThe globalization folks have told me that they’d prefer that\npeople didn’t use MLang.\nThey recommend instead the functions\n\nLCIDToLocaleName<\/code><\/a>\nand\n\nLocaleNameToLCID<\/code><\/a>.\nThe functions are built into Windows Vista\nand are also\n\navailable downlevel via a redistributable<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Occasionally, I see someone ask for a function that converts between LCIDs (such as 0x0409 for English-US) and RFC 1766 language identifiers (such as “en-us”). The rule of thumb is, if it’s something a web browser would need, and it has to do with locales and languages, you should look in the MLang library. In this […]<\/p>\n","protected":false},"author":1069,"featured_media":111744,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[25],"class_list":["post-32753","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oldnewthing","tag-code"],"acf":[],"blog_post_summary":"
Occasionally, I see someone ask for a function that converts between LCIDs (such as 0x0409 for English-US) and RFC 1766 language identifiers (such as “en-us”). The rule of thumb is, if it’s something a web browser would need, and it has to do with locales and languages, you should look in the MLang library. In this […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/32753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/users\/1069"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/comments?post=32753"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/32753\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media\/111744"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media?parent=32753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/categories?post=32753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/tags?post=32753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}