Get text from textbox in cursor position .net

I need to get text from a textbox in winforms, i need to get the text that the cursor is in between e.g

Hello or posit|ion or look

This should return the word position (Note here i used the pipe as the cursor)

Do you know any technique i can use for this

I tested this real quick and it seems like it works consistently

Private Function GetCurrentWord(ByRef txtbox As TextBox) As String
    Dim CurrentPos As Integer = txtbox.SelectionStart
    Dim StartPos As Integer = CurrentPos
    Dim EndPos As Integer = txtbox.Text.ToString.IndexOf(" ", StartPos)

    If EndPos < 0 Then
        EndPos = txtbox.Text.Length
    End If

    If StartPos = txtbox.Text.Length Then
        Return ""
    End If

    StartPos = txtbox.Text.LastIndexOf(" ", CurrentPos)
    If StartPos < 0 Then
        StartPos = 0
    End If

    Return txtbox.Text.Substring(StartPos, EndPos - StartPos).Trim
End Function