Is there any way that PropertyGridItem's can be changed to allow for the value to appear blank?

For example if I add a PropertyItemString

Set Item = Category.AddChildItem(PropertyItemString, "StringItem", "")

Then the propertygrid contains an item with no value (actually a zero length string)

For example if I add a PropertyItemDate

Set Item = Category.AddChildItem(PropertyItemDate, "DateItem", "")

Then the propertygrid contains an item with the value "01/01/2004". If the value is deleted, it is automatically reset to "01/01/2004"

For example if I add a PropertyItemNumber

Set Item = Category.AddChildItem(PropertyItemNumber, "NumberItem", "")

Then the propertygrid contains an item with the value "0". If the value is deleted, it is automatically reset to "0"

It would be a great help if this was possible as I would like my users to have the option of providing a date/number in the property grid.