Hello and thanks for your time. Let me explain what I am looking for. I am using Yanfly Item Core, but it has a feature that I don't like so much. When you use an item in game menu it appears a secondary window to confirm the use or cancel. It is there just in case you need add more things to do with them, but it isn't my case. So... it becomes really unfriendly for the player. Thats why I want to delete it and I tried it myself. Let me post what I was trying. The first thing I did was localize where the sub-window was creating. I am not complety sure how it works, but I located where the window was created (or called?). In the line 2035. After that I tried to localize where the "use" was called, It is in the line 2163. So I did a call ( Scene_Item.prototype.onActionUse.call(); ) to the function from 2163 inside 2035. Of course it crashed because, I suppose, it isn't taking the correct parameters in some way. I promise I was trying to understand it for many hours, but I must admit that I can't continue alone. Link to the plugin: http://yanfly.moe/2015/10/16/yep-11-item-core/ Again, thanks for your time and sorry for my English.