add missing win32 constant for old win sdk

Zhao Yuhang

2025-03-11 c00e986f38dbc4843d92cc76a385f826658c1e03

 src/core/CMakeLists.txt

@@ -6,6 +6,7 @@
set(_src
    qwkglobal.h
    qwkglobal_p.h
    qwkglobal.cpp
    windowagentbase.h
    windowagentbase_p.h
    windowagentbase.cpp