Function winapi::um::shellapi::SHGetUnreadMailCountA

pub unsafe extern "system" fn SHGetUnreadMailCountA(
    hKeyUser: HKEY, 
    pszMailAddress: LPCSTR, 
    pdwCount: *mut DWORD, 
    pFileTime: *mut FILETIME, 
    pszShellExecuteCommand: LPSTR, 
    cchShellExecuteCommand: c_int
) -> HRESULT