Change the location of the description of CompletionWindow.

Hello,

I want to change the FlowDirection of CompletionWindow to LeftToRight and the FlowDirection of the descriptions to RightToLeft.

I wrote this :

completionWindow = new CompletionWindow(textEditor.TextArea);

completionWindow.CompletionList.FlowDirection = System.Windows.FlowDirection.LeftToRight;

completionWindow.FlowDirection = System.Windows.FlowDirection.RightToLeft;

Everything is written exactly as I want but not in the right place because "FlowDirection.RightToLeft" the popup (of the description) created from right to left It covers the CompletionWindow and hides the list that is there.

My question is how I set the location of the description popup?