add theme win32 message

Zhao Yuhang

2023-12-12 5a0e5a9261c251dba54afb8cc0b6b32ae9d95510

 src/core/contexts/win32windowcontext_p.h

@@ -51,6 +51,9 @@
        bool nonClientCalcSizeHandler(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
                                      LRESULT *result);

        bool themeStuffHandler(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
                               LRESULT *resul);

    protected:
        WId windowId = 0;