Code Blocks(IDE): why i lose the text code focus?

i'm using Code Blocks.
i'm writing the text box code.
if i move the mouse from text code to another object, i lose the text box code focus.
i think theres 1 option for disable these, but now i don't know.
can anyone tell me?
on menu Settings - Environment.
on list Notebooks appearance, we disable\uncheck the "Enable the scrolling with mousewheel"
thank you so much for all
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