From 2cd9632c4aaaac36a451d6bbebef6312701aae30 Mon Sep 17 00:00:00 2001
From: santacrab2 <79347566+santacrab2@users.noreply.github.com>
Date: Mon, 28 Oct 2024 19:21:44 -0400
Subject: [PATCH] MailBox fix (#4377)

* Catches Out Of Bounds error on ListBox SelectedIndex for when the B_PartyDown_Click event is triggered and the current Selection is in LB_PCBOX.
---
 PKHeX.WinForms/Subforms/Save Editors/SAV_MailBox.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/PKHeX.WinForms/Subforms/Save Editors/SAV_MailBox.cs b/PKHeX.WinForms/Subforms/Save Editors/SAV_MailBox.cs
index 9d9f2a374..bf4c03cf3 100644
--- a/PKHeX.WinForms/Subforms/Save Editors/SAV_MailBox.cs	
+++ b/PKHeX.WinForms/Subforms/Save Editors/SAV_MailBox.cs	
@@ -586,6 +586,8 @@ private void NUD_MailIDn_ValueChanged(object sender, EventArgs e)
 
     private void SwapSlots(ListBox lb, bool down)
     {
+        if (lb.SelectedIndex == -1)
+            return;
         int index = lb.SelectedIndex;
         var otherIndex = index + (down ? 1 : -1);
         if ((uint)otherIndex >= lb.Items.Count)