diff --git a/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp b/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp
index a30292ab..6f027bad 100644
--- a/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp
+++ b/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp
@@ -2428,3 +2428,14 @@ void UIStatusWnd::ValidatePlacement() {
 
   this->SendMsg(nullptr, 35, 0, 0, 0, 0);
 }
+
+// OFFSET: 0x008FEAA0
+// FUNCTION: fn_12354
+int UILoadingWnd::SendMsg(UIWindow*, int message, std::intptr_t argument1, std::intptr_t, std::intptr_t, std::intptr_t) {
+  if (message == 17) {
+    char text[100];
+    std::sprintf(text, "Loading %d %s", static_cast<int>(argument1), "%");
+    this->m_progressBar->SetValue(static_cast<float>(argument1));
+  }
+  return 0;
+}
diff --git a/Source/UI/Dialogs/UILoadingWnd.h b/Source/UI/Dialogs/UILoadingWnd.h
index 5bd97988..52c36525 100644
--- a/Source/UI/Dialogs/UILoadingWnd.h
+++ b/Source/UI/Dialogs/UILoadingWnd.h
@@ -1,11 +1,18 @@
 #ifndef RAGNAROK_SOURCE_UI_DIALOGS_UILOADINGWND_H
 #define RAGNAROK_SOURCE_UI_DIALOGS_UILOADINGWND_H
 
+#include "UI/UIBarGraph.h"
 #include "UI/Window/UIFrameWnd.h"
 
+#include <cstdint>
+
 class UILoadingWnd : public UIFrameWnd {
 public:
   void Paint() override;
+  int SendMsg(UIWindow* sender, int message, std::intptr_t argument1, std::intptr_t argument2, std::intptr_t argument3, std::intptr_t argument4) override;
+
+  /* 00B4 */ unsigned char unknown_00B4[0x4];
+  /* 00B8 */ UIBarGraph* m_progressBar;
 };
 
 #endif