Hi,   If I understand correctly, one of the ways   (If you do not create a "Message" programmatically on JS) ... /* * Ext.MessageBox internal button array: * * [0] 'OK' * * [1] 'Yes' * * [2] 'No' * * [3] 'Cancel' */ 1.  procedure TMainForm.UniFormCreate(Sender: TObject); begin   UniSession.AddJS('Ext.override(Ext.MessageBox, {defaultButton: 3});'); end; 2. Can also be changed in runtime: procedure TMainForm.UniButton8Click(Sender: TObject); begin   UniSession.AddJS('Ext.override(Ext.M
    • Upvote
    1