From 21790200afed06f38d25fc941a6e6529f250cd30 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Wed, 4 Aug 2021 15:24:16 +0200
Subject: [PATCH] hook ShowWindow

---
 inc/hook.h         |  2 ++
 inc/winapi_hooks.h |  1 +
 src/hook.c         |  2 ++
 src/winapi_hooks.c | 14 ++++++++++++++
 src/wndproc.c      |  2 +-
 5 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/inc/hook.h b/inc/hook.h
index 4b26fe9..db564e4 100644
--- a/inc/hook.h
+++ b/inc/hook.h
@@ -30,6 +30,7 @@ typedef BOOL(WINAPI* ENABLEWINDOWPROC)(HWND, BOOL);
 typedef HWND(WINAPI* CREATEWINDOWEXAPROC)(DWORD, LPCSTR, LPCSTR, DWORD, int, int, int, int, HWND, HMENU, HINSTANCE, LPVOID);
 typedef BOOL(WINAPI* DESTROYWINDOWPROC)(HWND);
 typedef int (WINAPI* MAPWINDOWPOINTSPROC)(HWND, HWND, LPPOINT, UINT);
+typedef BOOL (WINAPI* SHOWWINDOWPROC)(HWND, int);
 typedef HHOOK(WINAPI* SETWINDOWSHOOKEXAPROC)(int, HOOKPROC, HINSTANCE, DWORD);
 typedef int (WINAPI* GETDEVICECAPSPROC)(HDC, int);
 typedef HMODULE(WINAPI* LOADLIBRARYAPROC)(LPCSTR);
@@ -60,6 +61,7 @@ extern ENABLEWINDOWPROC real_EnableWindow;
 extern CREATEWINDOWEXAPROC real_CreateWindowExA;
 extern DESTROYWINDOWPROC real_DestroyWindow;
 extern MAPWINDOWPOINTSPROC real_MapWindowPoints;
+extern SHOWWINDOWPROC real_ShowWindow;
 extern SETWINDOWSHOOKEXAPROC real_SetWindowsHookExA;
 extern GETDEVICECAPSPROC real_GetDeviceCaps;
 extern LOADLIBRARYAPROC real_LoadLibraryA;
diff --git a/inc/winapi_hooks.h b/inc/winapi_hooks.h
index 499b375..3b4ca4c 100644
--- a/inc/winapi_hooks.h
+++ b/inc/winapi_hooks.h
@@ -26,6 +26,7 @@ LONG WINAPI fake_GetWindowLongA(HWND hWnd, int nIndex);
 BOOL WINAPI fake_EnableWindow(HWND hWnd, BOOL bEnable);
 BOOL WINAPI fake_DestroyWindow(HWND hWnd);
 int WINAPI fake_MapWindowPoints(HWND hWndFrom, HWND hWndTo, LPPOINT lpPoints, UINT cPoints);
+BOOL WINAPI fake_ShowWindow(HWND hWnd, int nCmdShow);
 HHOOK WINAPI fake_SetWindowsHookExA(int idHook, HOOKPROC lpfn, HINSTANCE hmod, DWORD dwThreadId);
 int WINAPI fake_GetDeviceCaps(HDC hdc, int index);
 HMODULE WINAPI fake_LoadLibraryA(LPCSTR lpLibFileName);
diff --git a/src/hook.c b/src/hook.c
index 32b4a45..6cabb4f 100644
--- a/src/hook.c
+++ b/src/hook.c
@@ -38,6 +38,7 @@ ENABLEWINDOWPROC real_EnableWindow = EnableWindow;
 CREATEWINDOWEXAPROC real_CreateWindowExA = CreateWindowExA;
 DESTROYWINDOWPROC real_DestroyWindow = DestroyWindow;
 MAPWINDOWPOINTSPROC real_MapWindowPoints = MapWindowPoints;
+SHOWWINDOWPROC real_ShowWindow = ShowWindow;
 SETWINDOWSHOOKEXAPROC real_SetWindowsHookExA = SetWindowsHookExA;
 GETDEVICECAPSPROC real_GetDeviceCaps = GetDeviceCaps;
 LOADLIBRARYAPROC real_LoadLibraryA = LoadLibraryA;
@@ -74,6 +75,7 @@ static HOOKLIST g_hooks[] =
             { "CreateWindowExA", (PROC)fake_CreateWindowExA, (PROC*)&real_CreateWindowExA },
             { "DestroyWindow", (PROC)fake_DestroyWindow, (PROC*)&real_DestroyWindow },
             { "MapWindowPoints", (PROC)fake_MapWindowPoints, (PROC*)&real_MapWindowPoints },
+            { "ShowWindow", (PROC)fake_ShowWindow, (PROC*)&real_ShowWindow },
             { "", NULL, NULL }
         }
     },
diff --git a/src/winapi_hooks.c b/src/winapi_hooks.c
index 5010df5..a55018a 100644
--- a/src/winapi_hooks.c
+++ b/src/winapi_hooks.c
@@ -471,6 +471,20 @@ int WINAPI fake_MapWindowPoints(HWND hWndFrom, HWND hWndTo, LPPOINT lpPoints, UI
     return real_MapWindowPoints(hWndFrom, hWndTo, lpPoints, cPoints);
 }
 
+BOOL WINAPI fake_ShowWindow(HWND hWnd, int nCmdShow)
+{
+    if (g_ddraw && g_ddraw->hwnd == hWnd)
+    {
+        if (nCmdShow == SW_SHOWMAXIMIZED)
+            nCmdShow = SW_SHOWNORMAL;
+
+        if (nCmdShow == SW_MAXIMIZE)
+            nCmdShow = SW_NORMAL;
+    }
+
+    return real_ShowWindow(hWnd, nCmdShow);
+}
+
 HHOOK WINAPI fake_SetWindowsHookExA(int idHook, HOOKPROC lpfn, HINSTANCE hmod, DWORD dwThreadId)
 {
     if (idHook == WH_KEYBOARD_LL && hmod && GetModuleHandle("AcGenral") == hmod)
diff --git a/src/wndproc.c b/src/wndproc.c
index 4fe730c..784ea6f 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -524,7 +524,7 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
             {
                 if (g_ddraw->renderer != d3d9_render_main)
                 {
-                    ShowWindow(g_ddraw->hwnd, SW_MINIMIZE);
+                    real_ShowWindow(g_ddraw->hwnd, SW_MINIMIZE);
                     ChangeDisplaySettings(NULL, g_ddraw->bnet_active ? CDS_FULLSCREEN : 0);
                 }
             }