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Please help me with easy problems. How to connect(//)

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Please help to russian newcomer) My english is not enough to understand documentation very well. I have 2 problems. 1) This coonect doesn’t work: connect( &error, SIGNAL ), this, SLOT )); error is static member of class(this) I need to do this rulls: error.hide()<=>this.Enabled() error.show()<=>this.Disabled() 2) How to connect Enter key pressing(in this) with changing focus to next object, like Tab key does?

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