Although this seems like that I'm looking for, even better than what I am looking for in fact just judging by what I am able to see, I can only see the initial dialog window as it seems to be broken.
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -w mydialog 5: Unable to load normal icon
D_CERROR (listview) xdid -l mydialog 5: Invalid Command
On the dialog window itself it says "Mouse events are ignored", of which I'm presuming is the reason why the teabs will not work but regardless, I cannot use this dialog example.
Have you tried this yourself and if it works, what version of mIRC do you have?