How to highlight comment statements with unlimited levels of nesting in WinForms SyntaxEditor (EditControl)?

OnlyLocalSublexems="true" Type="comment">

private void editControl1_TextChanging(object sender, Syncfusion.Windows.Forms.Edit.TextChangingEventArgs e)
{
    if(e.Type==Syncfusion.Windows.Forms.Edit.Enums.TextChange.Inserted)
    {
         if(commentopencount!=0)
         {
             commentendingposition=this.editControl1.CurrentPosition;
             this.editControl1.SetTextColor(this.editControl1.ConvertVirtualPointToCoordinatePoint (commentstartingposition),this.editControl1.ConvertVirtualPointToCoordinatePoint(commentendingposition),Color.Green);
         }
         //Increment the number of comments open if "(*" has been typed
         //and decrement the number of comments if "*)" has been typed.
         charactercount++;
         if(e.Text=="*")
         {
             if((startingcharacter+1)==charactercount)
             {
                 commentopencount++;
                 if(commentopencount==1)
                 {
                     this.editControl1.SetTextColor(this.editControl1.ConvertVirtualPointToCoordinatePoint
(commentstartingposition),this.editControl1.ConvertVirtualPointToCoordinatePoint(this.editControl1.CurrentPosition),Color.Green);
                 }
             }
             else
             {
                 endingcharacter=charactercount;
             }
         }
         if(e.Text=="(")
         {
             startingcharacter=charactercount;
             if(commentopencount==0)
             commentstartingposition=this.editControl1.CurrentPosition;
         }
         if(e.Text==")")
         {
              if((endingcharacter+1)==charactercount)
              {
                  if(commentopencount>0)
                  {
                      commentopencount--;
                  }
              }
         }
     }
     else if(e.Type==Syncfusion.Windows.Forms.Edit.Enums.TextChange.Deleted)
     {
         //Increment the number of comments open if "*)" has been deleted
         //and decrement the number of comments if "(*" has been deleted.
         if(e.Text=="*")
         {
              if((charactercount+1)==endingcharacter)
              {
                   commentopencount++;
                   endingcharacter=0;
               }
               else
               {
                   startingcharacter=charactercount;
                   if(commentopencount<2)
                   this.editControl1.SetTextColor(this.editControl1.ConvertVirtualPointToCoordinatePoint
(commentstartingposition),this.editControl1.ConvertVirtualPointToCoordinatePoint(this.editControl1.CurrentPosition),Color.Black);
                }
            }
            if(e.Text=="(")
            {
                if((charactercount+1)==startingcharacter)
                {
                    startingcharacter=-1;
                    commentopencount--;
                 }
             }
             if(e.Text==")")
             {
                {
                   endingcharacter=charactercount;
                }
             }
             if(charactercount>0)
                charactercount--;
            }
}

Private Sub editControl1_TextChanging(ByVal sender As Object, ByVal e As Syncfusion.Windows.Forms.Edit.TextChangingEventArgs) Handles editControl1.TextChanging
  If e.Type=Syncfusion.Windows.Forms.Edit.Enums.TextChange.Inserted Then
   If commentopencount<>0 Then
commentendingposition=Me.editControl1.CurrentPosition
Me.editControl1.SetTextColor(Me.editControl1.ConvertVirtualPointToCoordinatePoint(commentstartingposition),Me.editControl1.ConvertVirtualPointToCoordinatePoint(commentendingposition),Color.Green)
End If
 ' Increment the number of comments open if "(*" has been typed
' and decrement the number of comments if "*)" has been typed.
     charactercount += 1
     If e.Text="*" Then
        If (startingcharacter+1)=charactercount Then
commentopencount += 1
        If commentopencount=1 Then
Me.editControl1.SetTextColor(Me.editControl1.ConvertVirtualPointToCoordinatePoint(commentstartingposition),Me.editControl1.ConvertVirtualPointToCoordinatePoint(Me.editControl1.CurrentPosition),Color.Green)
        End If
       Else
endingcharacter=charactercount
        End If
     End If
   If e.Text="(" Then
startingcharacter=charactercount
       If commentopencount=0 Then
commentstartingposition=Me.editControl1.CurrentPosition
       End If
   End If
   If e.Text=")" Then
       If (endingcharacter+1)=charactercount Then
If commentopencount>0 Then
  commentopencount -= 1
End If
       End If
   End If
Else If e.Type=Syncfusion.Windows.Forms.Edit.Enums.TextChange.Deleted Then
      ' Increment the number of comments open if "*)" has been deleted
      ' and decrement the number of comments if "(*" has been deleted.
     If e.Text="*" Then
         If (charactercount+1)=endingcharacter Then
 commentopencount += 1
 endingcharacter=0
Else
startingcharacter=charactercount
  If commentopencount<2 Then
Me.editControl1.SetTextColor(Me.editControl1.ConvertVirtualPointToCoordinatePoint(commentstartingposition),Me.editControl1.ConvertVirtualPointToCoordinatePoint(Me.editControl1.CurrentPosition),Color.Black)
  End If
End If
    End If
    If e.Text="(" Then
       If (charactercount+1)=startingcharacter Then
startingcharacter=-1
commentopencount -= 1
       End If
     End If
       If e.Text=")" Then
endingcharacter=charactercount
      End If
       If charactercount>0 Then
charactercount -= 1
       End If
   End If
End Sub