this code i made not working anyone know why??

[XxEvilxX]

Declare Function SetCursorPosition& Lib "user32" _
(ByVal x As Long, ByVal y As Long)


Sub setpos(txt1 As TextBox, txt2 As TextBox)
If txt2.Text = "200" Then
txt1.Text = txt1.Text + 1
txt2.Text = "0"
Else
If txt1.Text = "200" Then
txt1.Text = "0"
Else
t& = SetCursorPos(txt1.Text, txt2.Text)
End If
End If
End Sub