Named Expressions (IsMdlDialogOpen)

Question

When using Named Expressions how can I find out a dialogs ID, example below. Looking for the "Choose Element - Element Selection" dialog ID. 
 Session.IsMdlDialogOpen(-7, "REF")

Marc Thomas · Accepted Answer

key-ins: 
 
 expression show toolboxes 
 expression show dotnetdialogs 
 
 Will display the IDs you are looking for. 
 The existing named Expression 'Session.ActiveCommandKeyin()' will return the key-in command of the currently active tool, e.g. CHOOSE ELEMENT 
 Whether you can use these to show/hide when the selection tool is selected but without an active selection I'm not sure. 
 I thought this one might work but it just returns True, there may be a way of building on it... 
 Session.EvalCExprAsBool("Session.ActiveCommandKeyin()", "CHOOSE ELEMENT")=False 
 If you are willing to have an active selection, then 'Selection.IsActive()' works without further ado.

Mike Longstreet · Answer

I did get this to work after some testing with your seggested expression. The one that worked for me seem to be 
 Expression = Session.ActiveCommandKeyin()="CHOOSE ELEMENT". This is actually a delivered Named Expression named "IsSelectionTool"