Jerry,

I messed with this a bit this morning and I see what you're talking about when you say that the DataColumnP property stays null. I'm sure there's another way around this, but here's what I did to get it to work.

You're actually after the ColumnName, but you're using a DataColumn because you want to be able to pick a column from the Property Sheet, correct? What I did was create another Property, call it MyColumnName, and in the set of your DataColumnP property, set like this:

private DataColumn _dc;
private string _name;

public DataColumn DataColumnP
{
  get {return _dc;}
  set 
  {
    this._dc = value;
    this._name = value.ColumnName;
  }
}
public string MyColumnName
{
  get {return _name;}
  set {this._name = value;}
}

Then use either _name or MyColumnName in your DataBinding. The main reason for making MyColumnName a property is just so it will show up on the PropertySheet, so you have some feedback that you actually picked a column, since it doesn't show up under DataColumnP unless you expand the +. Should work like a charm.

~~Bonnie