Watcher.LPOVERLAPPED_COMPLETION_ROUTINE

Undocumented in source but is binding to Windows. You might be able to learn more by searching the web for its name.
class Watcher
version(Windows)
extern (Windows)
alias LPOVERLAPPED_COMPLETION_ROUTINE = VOID function(DWORD dwErrorCode, DWORD dwNumberOfBytesTransfered, OVERLAPPED* lpOverlapped)

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