DDE applications written for the international market must be able to exchange data in several different languages. The CONVCONTEXT data structure, along with WinDdeInitiate and WinDdeRespond, provide this support.

A language-sensitive DDE application defines the context of a conversation by filling a CONVCONTEXT data structure with the appropriate country code and code-page identifiers. The CONVCONTEXT data structure also contains a context flag. If this flag is set to DDECTXT_CASESENSITIVE, applications must compare strings in a case-sensitive manner. Language-sensitive DDE applications use WinDdeInitiate and WinDdeRespond to establish a DDE conversation. These functions pass a pointer to a CONVCONTEXT data structure.