user32: Mark internal functions with hidden visibility.
diff --git a/dlls/user32/user_private.h b/dlls/user32/user_private.h
index bd7d39e..92b52a3 100644
--- a/dlls/user32/user_private.h
+++ b/dlls/user32/user_private.h
@@ -204,11 +204,11 @@
 
 extern BOOL CLIPBOARD_ReleaseOwner(void) DECLSPEC_HIDDEN;
 extern BOOL FOCUS_MouseActivate( HWND hwnd ) DECLSPEC_HIDDEN;
-extern BOOL set_capture_window( HWND hwnd, UINT gui_flags, HWND *prev_ret );
+extern BOOL set_capture_window( HWND hwnd, UINT gui_flags, HWND *prev_ret ) DECLSPEC_HIDDEN;
 extern void free_dce( struct dce *dce, HWND hwnd ) DECLSPEC_HIDDEN;
 extern void invalidate_dce( HWND hwnd, const RECT *rect ) DECLSPEC_HIDDEN;
 extern void erase_now( HWND hwnd, UINT rdw_flags ) DECLSPEC_HIDDEN;
-extern void *get_hook_proc( void *proc, const WCHAR *module );
+extern void *get_hook_proc( void *proc, const WCHAR *module ) DECLSPEC_HIDDEN;
 extern LRESULT call_current_hook( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam ) DECLSPEC_HIDDEN;
 extern BOOL map_wparam_AtoW( UINT message, WPARAM *wparam, enum wm_char_mapping mapping ) DECLSPEC_HIDDEN;
 extern NTSTATUS send_hardware_message( HWND hwnd, const INPUT *input, UINT flags ) DECLSPEC_HIDDEN;