LPPROGRESS_ROUTINE

Undocumented in source but is binding to Windows. You might be able to learn more by searching the web for its name.
nothrow extern (Windows)
alias LPPROGRESS_ROUTINE = DWORD function(LARGE_INTEGER, LARGE_INTEGER, LARGE_INTEGER, LARGE_INTEGER, DWORD, DWORD, HANDLE, HANDLE, LPVOID)

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