Added declaration of the DisconnectNamedPipe call.

diff --git a/include/winbase.h b/include/winbase.h
index 53976f2..e92ea92 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1160,6 +1160,7 @@
 BOOL        WINAPI DeregisterEventSource(HANDLE);
 BOOL        WINAPI DeviceIoControl(HANDLE,DWORD,LPVOID,DWORD,LPVOID,DWORD,LPDWORD,LPOVERLAPPED);
 BOOL        WINAPI DisableThreadLibraryCalls(HMODULE);
+BOOL        WINAPI DisconnectNamedPipe(HANDLE);
 BOOL        WINAPI DosDateTimeToFileTime(WORD,WORD,LPFILETIME);
 BOOL        WINAPI DuplicateHandle(HANDLE,HANDLE,HANDLE,HANDLE*,DWORD,BOOL,DWORD);
 BOOL        WINAPI EscapeCommFunction(HANDLE,UINT);