FIX: SelText Does Not Return Last Character in Text BoxID: Q183257 
  | 
If the selected text within a textbox includes the last character of the controls Text property, the SelText property will not include the last character.
To work around this problem, you can use the SelStart and SelLength
properties to capture the selected string:
   Dim strSelected
   If Text1.SelLength > 0 then
      strSelected = Mid(Text1.Text, Text1.SelStart + 1, Text1.SelLength)
   End If 
Microsoft has confirmed this to be a problem in the Microsoft products listed 
at the beginning of this article.
This problem was corrected in Windows CE Toolkit for Visual Basic 6.0.
When the selected text includes the last character of the control's Text
property, the SelText property will not include the last character.
For example, assume a textbox control contains the characters "this is a
test" (without the quotation marks):
+----------------------------------------------------------------+
|    If the selected text is:     |         SelText Property     |
+----------------------------------------------------------------+
|      "is a test"                |            "is a tes"        |
+----------------------------------------------------------------+
|      "This is a"                |            "This is a"       |
+----------------------------------------------------------------+ 
Books Online for Microsoft Windows CE Toolkit for Visual Basic 5.0
Additional query words: VBCE wce selection vbce5 vbce6
Keywords          : kbToolkit kbVBp kbVBp500bug kbVBp600fix kbWinCE kbWinCE100 kbGrpVB 
Version           : WINDOWS:1.0
Platform          : WINDOWS 
Issue type        : kbbug 
Last Reviewed: March 3, 1999