comPluginDemoScriptAccessible.powerpro in http://tech.groups.yahoo.com/group/power-pro/files/0_TEMP_/AlansPluginProvisional/
as it's last statement invokes BeginEditCollection on an ITextDocument obtained from a richedit control created by dialog plugin. It fails on my home machine, but I just tried it on XP, and seems to work. Does it for you? Dialog requires regex.ico, which you can get from regex or dialog plug distros.
