diff --git a/docs/progress.svg b/docs/progress.svg
index b2bc869..b6926cb 100644
--- a/docs/progress.svg
+++ b/docs/progress.svg
@@ -69,10 +69,10 @@
 </g>
 <g transform="translate(0 116)">
 <text x="0" y="7.50">Tomb2.exe progress according to the physical function order:</text>
-<text class="todo" style="font-size: 12px; " x="747" y="9"><tspan text-anchor="end"><tspan class="decompiled">40.97% (499)</tspan> · <tspan class="known">56.57% (689)</tspan> · <tspan class="todo">0% (0)</tspan> · <tspan class="unused">2.46% (30)</tspan></tspan></text>
+<text class="todo" style="font-size: 12px; " x="747" y="9"><tspan text-anchor="end"><tspan class="decompiled">41.05% (500)</tspan> · <tspan class="known">56.49% (688)</tspan> · <tspan class="todo">0% (0)</tspan> · <tspan class="unused">2.46% (30)</tspan></tspan></text>
 <g transform="translate(0 20)">
-<rect width="306.04" height="6" x="0" y="0" class="decompiled"/>
-<rect width="422.56" height="6" x="306.04" y="0" class="known"/>
+<rect width="306.65" height="6" x="0" y="0" class="decompiled"/>
+<rect width="421.95" height="6" x="306.65" y="0" class="known"/>
 <rect width="18.40" height="6" x="728.60" y="0" class="unused"/>
 </g>
 <g transform="translate(0 31)">
@@ -899,7 +899,7 @@
 <rect width="12" height="12" x="300" y="240" class="decompiled"><title>bool __cdecl DDrawCreate(LPGUID lpGUID);</title></rect>
 <rect width="12" height="12" x="315" y="240" class="decompiled"><title>void __cdecl DDrawRelease(void);</title></rect>
 <rect width="12" height="12" x="330" y="240" class="decompiled"><title>void __cdecl GameWindowCalculateSizeFromClient(int32_t *width, int32_t *height);</title></rect>
-<rect width="12" height="12" x="345" y="240" class="known"><title>void __cdecl GameWindowCalculateSizeFromClientByZero(int32_t *width, int32_t *height);</title></rect>
+<rect width="12" height="12" x="345" y="240" class="decompiled"><title>void __cdecl GameWindowCalculateSizeFromClientByZero(int32_t *width, int32_t *height);</title></rect>
 <rect width="12" height="12" x="360" y="240" class="decompiled"><title>void __cdecl WinVidSetMinWindowSize(int32_t width, int32_t height);</title></rect>
 <rect width="12" height="12" x="375" y="240" class="decompiled"><title>void __cdecl WinVidClearMinWindowSize(void);</title></rect>
 <rect width="12" height="12" x="390" y="240" class="decompiled"><title>void __cdecl WinVidSetMaxWindowSize(int32_t width, int32_t height);</title></rect>
@@ -1298,10 +1298,10 @@
 </g>
 <g transform="translate(0 546)">
 <text x="0" y="7.50">Tomb2.exe progress according to the function sizes:</text>
-<text class="todo" style="font-size: 12px; " x="747" y="9"><tspan text-anchor="end"><tspan class="decompiled">38.02%</tspan> · <tspan class="known">61.65%</tspan> · <tspan class="todo">0%</tspan> · <tspan class="unused">0.33%</tspan></tspan></text>
+<text class="todo" style="font-size: 12px; " x="747" y="9"><tspan text-anchor="end"><tspan class="decompiled">38.05%</tspan> · <tspan class="known">61.62%</tspan> · <tspan class="todo">0%</tspan> · <tspan class="unused">0.33%</tspan></tspan></text>
 <g transform="translate(0 20)">
-<rect width="284.02" height="6" x="0" y="0" class="decompiled"/>
-<rect width="460.54" height="6" x="284.02" y="0" class="known"/>
+<rect width="284.25" height="6" x="0" y="0" class="decompiled"/>
+<rect width="460.31" height="6" x="284.25" y="0" class="known"/>
 <rect width="2.44" height="6" x="744.56" y="0" class="unused"/>
 </g>
 <g transform="translate(0 31)">
@@ -1997,7 +1997,7 @@
 <rect width="6.63" height="6.22" x="608.29" y="226.42" class="known"><title>void __cdecl DrawUnclippedItem(ITEM_INFO *item);</title></rect>
 <rect width="6.63" height="6.22" x="617.93" y="226.42" class="known"><title>bool __cdecl PlayFMV(const char *file_name);</title></rect>
 <rect width="6.54" height="6.22" x="627.56" y="226.42" class="decompiled"><title>void __cdecl Direct3DRelease(void);</title></rect>
-<rect width="6.54" height="6.22" x="637.10" y="226.42" class="known"><title>void __cdecl GameWindowCalculateSizeFromClientByZero(int32_t *width, int32_t *height);</title></rect>
+<rect width="6.54" height="6.22" x="637.10" y="226.42" class="decompiled"><title>void __cdecl GameWindowCalculateSizeFromClientByZero(int32_t *width, int32_t *height);</title></rect>
 <rect width="6.54" height="6.22" x="646.65" y="226.42" class="known"><title>bool __cdecl WinVidRegisterGameWindowClass(void);</title></rect>
 <rect width="6.54" height="6.22" x="656.19" y="226.42" class="known"><title>int32_t __cdecl CreateTexturePage(int32_t width, int32_t height, bool alpha);</title></rect>
 <rect width="6.45" height="6.22" x="665.73" y="226.42" class="decompiled"><title>void __cdecl Lara_Col_SwanDive(ITEM_INFO *item, COLL_INFO *coll);</title></rect>
diff --git a/docs/progress.txt b/docs/progress.txt
index b98ddef..ab91eb4 100644
--- a/docs/progress.txt
+++ b/docs/progress.txt
@@ -3011,7 +3011,7 @@ typedef struct {
 0x00444BD0  0x0054  +R      bool __cdecl DDrawCreate(LPGUID lpGUID);
 0x00444C30  0x0033  +R      void __cdecl DDrawRelease(void);
 0x00444C70  0x0073  +R      void __cdecl GameWindowCalculateSizeFromClient(int32_t *width, int32_t *height);
-0x00444CF0  0x006A  -R      void __cdecl GameWindowCalculateSizeFromClientByZero(int32_t *width, int32_t *height);
+0x00444CF0  0x006A  +R      void __cdecl GameWindowCalculateSizeFromClientByZero(int32_t *width, int32_t *height);
 0x00444D60  0x0041  +R      void __cdecl WinVidSetMinWindowSize(int32_t width, int32_t height);
 0x00444DB0  0x0008  +R      void __cdecl WinVidClearMinWindowSize(void);
 0x00444DC0  0x0041  +R      void __cdecl WinVidSetMaxWindowSize(int32_t width, int32_t height);
diff --git a/src/decomp/decomp.c b/src/decomp/decomp.c
index 035c279..c7a2276 100644
--- a/src/decomp/decomp.c
+++ b/src/decomp/decomp.c
@@ -2162,3 +2162,14 @@ void __cdecl GameWindowCalculateSizeFromClient(
     *width = rect.right - rect.left;
     *height = rect.bottom - rect.top;
 }
+
+void __cdecl GameWindowCalculateSizeFromClientByZero(
+    int *const width, int *const height)
+{
+    RECT rect = { 0, 0, 0, 0 };
+    const DWORD style = GetWindowLong(g_GameWindowHandle, GWL_STYLE);
+    const DWORD styleEx = GetWindowLong(g_GameWindowHandle, GWL_EXSTYLE);
+    AdjustWindowRectEx(&rect, style, FALSE, styleEx);
+    *width += rect.left - rect.right;
+    *height += rect.top - rect.bottom;
+}
diff --git a/src/decomp/decomp.h b/src/decomp/decomp.h
index fabfecb..ff3fe85 100644
--- a/src/decomp/decomp.h
+++ b/src/decomp/decomp.h
@@ -103,3 +103,4 @@ bool __cdecl Direct3DInit(void);
 bool __cdecl DDrawCreate(LPGUID lpGUID);
 void __cdecl DDrawRelease(void);
 void __cdecl GameWindowCalculateSizeFromClient(int *width, int *height);
+void __cdecl GameWindowCalculateSizeFromClientByZero(int *width, int *height);
diff --git a/src/global/funcs.h b/src/global/funcs.h
index 30c2637..9e8416f 100644
--- a/src/global/funcs.h
+++ b/src/global/funcs.h
@@ -443,7 +443,6 @@
 #define ControlLavaBlob ((void __cdecl (*)(int16_t fx_num))0x00442F40)
 #define GiantYetiControl ((void __cdecl (*)(int16_t item_num))0x00443050)
 #define YetiControl ((void __cdecl (*)(int16_t item_num))0x00443350)
-#define GameWindowCalculateSizeFromClientByZero ((void __cdecl (*)(int32_t *width, int32_t *height))0x00444CF0)
 #define CompareVideoModes ((bool __thiscall (*)(const DISPLAY_MODE *mode1, const DISPLAY_MODE *mode2))0x004459A0)
 #define WinVidGetDisplayModes ((bool __cdecl (*)(void))0x004459F0)
 #define EnumDisplayModesCallback ((HRESULT __stdcall (*)(LPDDSDESC lpDDSurfaceDesc, LPVOID lpContext))0x00445A50)
diff --git a/src/inject_exec.c b/src/inject_exec.c
index 9136af9..96f2704 100644
--- a/src/inject_exec.c
+++ b/src/inject_exec.c
@@ -148,6 +148,7 @@ static void Inject_Decomp(const bool enable)
     INJECT(enable, 0x00444BD0, DDrawCreate);
     INJECT(enable, 0x00444C30, DDrawRelease);
     INJECT(enable, 0x00444C70, GameWindowCalculateSizeFromClient);
+    INJECT(enable, 0x00444CF0, GameWindowCalculateSizeFromClientByZero);
 }
 
 static void Inject_Background(const bool enable)