在某些时候，我有这个LRESULTCALLBACKWinProc(HWNDhWnd,UINTmsg,WPARAMwParam,LPARAMlParam){if(msg==WM_CREATE){LPCREATESTRUCTpcs=(LPCREATESTRUCT)lParam;D2DResources*pD2DResources=(D2DResources*)pcs->lpCreateParams;::SetWindowLongPtrW(hWnd,GWLP_USERDATA,PtrToUlong(pD2DResources));}else{D2DResources*pD2DResource