I just test my program for FWH1512.
I found appear open Windows into MENU's item(show open windows) delay 1 second. but other menu no problem.
I use MDI.
DEFINE WINDOW poWnd MDI ;
FROM 0, 0 TO 38, 130 ;
TITLE cSysTitle+_Version_ID+"【"+"新北市三重區-"+cProject+"】" ;
MENUINFO 4 VSCROLL HSCROLL ;
MENU ::Build_FW_Menu()