diff --git a/Source/UI/Window/UISeekPartyMBWnd.cpp b/Source/UI/Window/UISeekPartyMBWnd.cpp
index fc97585f..bd064ccf 100644
--- a/Source/UI/Window/UISeekPartyMBWnd.cpp
+++ b/Source/UI/Window/UISeekPartyMBWnd.cpp
@@ -1,7 +1,153 @@
 #include "UI/Window/UISeekPartyMBWnd.h"
 #include "Contents/MessageTable.h"
+#include "Contents/UserData/NormalItemSlots.h"
+#include "Network/Connection/Connection.h"
+#include "Network/Packets/PacketId.h"
+#include "Network/Packets/PacketLengths.h"
 #include "UI/Buttons/UICheckBox.h"
+#include "UI/Edit/UIEditCtrl.h"
 #include "UI/Lists/UIComboBoxDefWnd.h"
+#include "UI/Window/UISeekPartyWnd.h"
+#include "UI/Window/UIWindowMgr.h"
+#include "UI/Window/WindowDialogs.h"
+#include "UI/Window/WindowManagerWindows.h"
+#include "Utility/Text/FormatString.h"
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+namespace {
+#pragma pack(push, 1)
+struct PACKET_CZ_PARTY_BOOKING_REQ_REGISTER {
+  /* 0000 */ short packetType;
+  /* 0002 */ PARTY_BOOKING_DETAIL detail;
+};
+#pragma pack(pop)
+}
+
+// OFFSET: 0x00939EE0
+// FUNCTION: fn_12756
+int UISeekPartyMBWnd::SendMsg(UIWindow* sender, int message, std::intptr_t a, std::intptr_t b, std::intptr_t c, std::intptr_t d) {
+  WindowDialogs& dialogs = *reinterpret_cast<WindowDialogs*>(&g_windowMgr);
+
+  switch (message) {
+  case 6:
+    switch (a) {
+    case 184: {
+      for (int i = 0; i < 6; ++i) {
+        this->m_registration.detail.job[i] = -1;
+      }
+
+      int count = 0;
+      for (int category = 0; category < 8; ++category) {
+        std::map<unsigned short, UICheckBox*>& checks = this->m_jobChecks[category];
+        for (auto it = checks.begin(); it != checks.end(); ++it) {
+          if (it->second->geometry.unknown_0030) {
+            if (count < 6) {
+              this->m_registration.detail.job[count] = it->first;
+            }
+            ++count;
+          }
+        }
+      }
+
+      if (count == 0) {
+        dialogs.Confirm(LookupMessage(1768), 0, true, false, 0, "Message", 280, 120, 0);
+        break;
+      }
+
+      if (count > 6) {
+        char text[100];
+        std::memset(text, 0, sizeof(text));
+        std::sprintf(text, LookupMessage(1769), count);
+        dialogs.Confirm(text, 0, true, false, 0, "Message", 280, 120, 0);
+        break;
+      }
+
+      std::string level(this->m_levelEdit->Text());
+      for (unsigned int i = 0; i < level.size(); ++i) {
+        if (level[i] < '/' || level[i] > '9') {
+          dialogs.Confirm(LookupMessage(1770), 0, true, false, 0, "Message", 280, 120, 0);
+          return 0;
+        }
+      }
+
+      this->m_registration.detail.level = static_cast<short>(std::atoi(this->m_levelEdit->Text()));
+      g_partyBookingLevelLimit = this->m_registration.detail.level;
+      const int maximum = g_partyBookingLevelMax;
+      if (this->m_registration.detail.level >= 1 && this->m_registration.detail.level <= maximum) {
+        this->m_registration.detail.mapId = static_cast<short>((this->m_type + 1) * 256 | this->m_subType);
+        if (!this->m_frameContext->windows.CloseWindow(164)) {
+          PACKET_CZ_PARTY_BOOKING_REQ_REGISTER packet;
+          packet.packetType = ID_CZ_PARTY_BOOKING_REQ_REGISTER;
+          packet.detail = this->m_registration.detail;
+          GetRagConnection().Send(g_packetLengths.FixedLength(packet.packetType), &packet);
+        }
+      } else {
+        char text[260];
+        std::memset(text, 0, sizeof(text));
+        StringFormat(text, sizeof(text), static_cast<std::size_t>(-1), LookupMessage(2601), maximum);
+        dialogs.Confirm(text, 0, true, false, 0, "Message", 280, 120, 0);
+      }
+      break;
+    }
+    case 185:
+    case 201:
+      this->m_frameContext->windows.CloseWindow(168);
+      this->m_frameContext->windows.CloseWindow(170);
+      break;
+    case 202:
+      if (this->m_minimized) {
+        this->Resize(this->geometry.width, this->m_restoreHeight);
+      } else {
+        this->m_restoreHeight = this->geometry.height;
+        this->Resize(this->geometry.width, 17);
+      }
+
+      this->m_minimized = !this->m_minimized;
+      this->Invalidate();
+      break;
+    }
+    break;
+  case 34:
+    this->m_saved = reinterpret_cast<SeekPartyMBWndInfo*>(a);
+    if (!this->m_saved->IsValid()) {
+      this->m_saved->Reset();
+    }
+
+    this->Move(this->m_saved->x, this->m_saved->y);
+    this->SendMsg(nullptr, 14, 3, this->m_saved->width, this->m_saved->height, 0);
+    this->SendMsg(nullptr, 23, 0, 0, 0, 0);
+    break;
+  case 39:
+    if (sender == this->m_typeCombo) {
+      const int key = a + 2;
+      this->m_subTypeCombo->Clear();
+      auto found = this->m_subTypes.find(key);
+      if (found != this->m_subTypes.end()) {
+        const std::vector<std::pair<std::string, int>> entries = found->second;
+        for (auto it = entries.begin(); it != entries.end(); ++it) {
+          const std::pair<std::string, int> entry = *it;
+          this->m_subTypeCombo->AddOption(entry.first.c_str(), entry.second);
+        }
+      }
+
+      this->m_type = static_cast<short>(a);
+      this->m_subTypeCombo->Select(0);
+      this->m_subType = 0;
+    } else if (sender == this->m_subTypeCombo) {
+      this->m_subType = static_cast<short>(a);
+    } else if (sender == this->m_jobCategoryCombo) {
+      this->ShowJobCategory(a);
+    }
+    break;
+  default:
+    return UIFrameWnd::SendMsg(sender, message, a, b, c, d);
+  }
+
+  return 0;
+}
 
 // OFFSET: 0x00944370
 // FUNCTION: fn_12831
diff --git a/Source/UI/Window/UISeekPartyMBWnd.h b/Source/UI/Window/UISeekPartyMBWnd.h
index 9aadecb2..64d09665 100644
--- a/Source/UI/Window/UISeekPartyMBWnd.h
+++ b/Source/UI/Window/UISeekPartyMBWnd.h
@@ -1,33 +1,53 @@
 #ifndef RAGNAROK_SOURCE_UI_WINDOW_UISEEKPARTYMBWND_H
 #define RAGNAROK_SOURCE_UI_WINDOW_UISEEKPARTYMBWND_H
 
+#include "Contents/Party/PartyBookingInfo.h"
 #include "UI/Window/UIFrameWnd.h"
 
 #include <map>
+#include <string>
+#include <utility>
+#include <vector>
 
 struct UIButtonContext;
 struct SeekPartyMBWndInfo;
 class UICheckBox;
 class UIComboBoxDefWnd;
+class UIEditCtrl;
+
+#pragma pack(push, 1)
+struct SeekPartyRegistration {
+  /* 0000 */ PARTY_BOOKING_DETAIL detail;
+};
+#pragma pack(pop)
 
 class UISeekPartyMBWnd : public UIFrameWnd {
 public:
   void Slot11() override;
   void Paint() override;
+  int SendMsg(UIWindow* sender, int message, std::intptr_t a, std::intptr_t b, std::intptr_t c, std::intptr_t d) override;
   void CreateJobChecks();
   void InitJobCategoryCombo();
   void ShowJobCategory(int category);
 
 protected:
-  /* 00BC */ unsigned char unknown_00BC[0x14];
+  /* 00BC */ unsigned char unknown_00BC[8];
+  /* 00C4 */ UIEditCtrl* m_levelEdit;
+  /* 00C8 */ UIComboBoxDefWnd* m_typeCombo;
+  /* 00CC */ UIComboBoxDefWnd* m_subTypeCombo;
   /* 00D0 */ UIComboBoxDefWnd* m_jobCategoryCombo;
   /* 00D4 */ unsigned char unknown_00D4[0x30];
   /* 0104 */ std::map<unsigned short, UICheckBox*> m_jobChecks[8];
-  /* 0144 */ unsigned char unknown_0144[0x18];
+  /* 0144 */ unsigned char unknown_0144[8];
+  /* 014C */ std::map<int, std::vector<std::pair<std::string, int>>> m_subTypes;
+  /* 0154 */ unsigned char unknown_0154[8];
   /* 015C */ int m_jobCategory;
-  /* 0160 */ unsigned char unknown_0160[0x8];
+  /* 0160 */ short m_type;
+  /* 0162 */ short m_subType;
+  /* 0164 */ int m_restoreHeight;
   /* 0168 */ unsigned char m_minimized;
-  /* 0169 */ unsigned char unknown_0169[0x13];
+  /* 0169 */ SeekPartyRegistration m_registration;
+  /* 0179 */ unsigned char unknown_0179[3];
   /* 017C */ SeekPartyMBWndInfo* m_saved;
   UIButtonContext* m_controls;
 };
diff --git a/Source/UI/Window/UISeekPartyWnd.h b/Source/UI/Window/UISeekPartyWnd.h
index e9aa94ed..5bbd67f6 100644
--- a/Source/UI/Window/UISeekPartyWnd.h
+++ b/Source/UI/Window/UISeekPartyWnd.h
@@ -10,6 +10,9 @@ class UIStaticText;
 struct UIButtonContext;
 struct SeekPartyWndInfo;
 
+extern int g_partyBookingLevelLimit;
+extern int g_partyBookingLevelMax;
+
 class UISeekPartyWnd : public UIFrameWnd {
 public:
   void Slot11() override;