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I followed a suggestion found in your forum on how to speed up merging of child forms'' menus; through the use of RegisterMdiChildTypes.
I also use UpdateUIMFCStyle.
RegisterMdiChildTypes needs to call the default constructor of child forms. The default constructor does not initialise every variable thus some variables are still null.
Now I see that UpdateUI is fired for the "dummy instances". In UpdateUI events, now I have to place null checks on the variables that I haven''t initialised.
My question is, if I use RegisterMdiChildTypes, should I switch off UpdateUIMFCStyle?