This is the interface to the object interface of the current object. The current object is the object which has been inserted last. Since the mail merge facility also uses text objects, you can also use CurrObj to manipulate fields created by InputField
This C# code inserts a horizontal line and then changes it's color to red.
IWPTextObj obj = wpdllInt1.CurrObj;
obj.IntParam = wpdllInt1.ToRGB(Color.Red);
This VB code inserts a field and then makes it "editable"
Dim Cursor As IWPTextCursor
Dim Field As IWPTextObj
Set Cursor = WPDLLInt1.Memo.TextCursor
Set Field = WPDLLInt1.Memo.CurrObj
Cursor.InputText "Some text"
Cursor.InputField "FieldName", "Display Text", False
Field.Mode = 2 ' Make it Editable!
Cursor.InputText "Some more text"
'Switch to edit mode
WPDLLInt1.Memo.FormCompletion = True