Setting the width value in warn

How can we set the user defined width value inside warn function.

I am facing the issue when user want to delete the multiple record
and error message is coming into two lines, where my requirement
is message must come on one line and user can delete max 100
records at a time.

I tried with widh : 400, auto, '*' and 'autowidth' but i did not
get appropriate result. all these option is not working.

I tried with given below
//--------------------------------------------
isc.warn
(
message,
{
width : 400,
title :'Remove Confirmation' MeiResources.get(this.isDeleteRemove ?
'Browser.Message.Remove.Title' : 'Browser.Message.Delete.Title'),
buttons : [ Dialog.YES, Dialog.NO ]
}
)

Attached Images

ErrorMessage.png (8.4 KB)