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emwin window manager paint parrent when create new window

Question asked by Dolphin Apadana on Dec 21, 2016

hi everyone i have a problem in emwin

my program contains some framewin that open one in another(means they are modal and open as child of others)

in each framewin i have some widget contains an image as background when i open new framewin in another framewin

the paint message of parent runs ,this process make the program heavy and consequently flicker effect

my question is that how to avoid parent window repaint when another window cover its area completely

thanks in advance