20.2窗口消息(1 ■202.1 COPYDATASTRUCT结构 typedef struct tag COP YDATASTRUCT DWORD dwData DWORD cdAta PVOID IpData 3 COPYDATASTRUCT, * PCOPYDATASTRUCT ■2022 WM COPYDATA消息20.2 窗口消息(1) ◼ 20.2.1 COPYDATASTRUCT结构 typedef struct tagCOPYDATASTRUCT { DWORD dwData; DWORD cbData; PVOID lpData; } COPYDATASTRUCT, *PCOPYDATASTRUCT; ◼ 20.2.2 WM_COPYDATA消息