I am confusing about my dll which is for ArcMap.

There are 4 forms, one is Property Setting Form which will provide certain value to other forms, at present, I am using form.hide after user setup the property value, then other forms could directly get those values. But I need to unload the Property Setting Form after user sets up those values, so could some one help me to set up global value for this dll or other ways to solve this problem? thank you for your time and attention.

Regards

Yanli