Hi Graham,
Thanks for contacting Syncfusion forums.
Yes, you can use our Window control as a dialog box. Please
refer the below code snippet.
<code>
[ASPX]
<syncfusion:Window ID="window" runat="server" InitiallyShown="true" Height="200" Width="400">
</syncfusion:Window>
</code>
We have also prepared a simple sample with our Window
control and it can be downloaded from the below link.
WindowSample.zip
Please refer the below online UG link for more concepts and
features of Window control.
http://help.syncfusion.com/ug/asp.net/tools/default.htm#!Documents/conceptsandfeatures34.htm
Please let us know if you have any concerns.
Regards,
Meena