Fred,

>How do you get custom property descriptions to show up in the property sheet during development?

You need to adorn the property with the Description attribute. For example:

[Category("Data"), 
Description("Specifies if the control is automatically bound."),
DefaultValue(true)]
public virtual bool BindingFlag
{
	get	{ return _bindingFlag; }
	set	{ _bindingFlag = value;}
}
private bool _bindingFlag = true;

I have included a few other commonly used design-time attributes.

• Category - specifies the category in which the property appears when the property window is sorted by category. This can be one of the existing categories, or your own custom category
  
• DefaultValue - specifies he default value of the property

Best Regards,