Initial version

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "libs/libvalinet"]
+	path = libs/libvalinet
+	url = https://github.com/valinet/libvalinet

Win11DisableRoundedCorners.sln

@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31624.102
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Win11DisableRoundedCorners", "Win11DisableRoundedCorners\Win11DisableRoundedCorners.vcxproj", "{C4A6832A-9AE5-4AA5-A424-15CF8179F318}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Debug|x64.ActiveCfg = Debug|x64
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Debug|x64.Build.0 = Debug|x64
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Debug|x86.ActiveCfg = Debug|Win32
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Debug|x86.Build.0 = Debug|Win32
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Release|x64.ActiveCfg = Release|x64
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Release|x64.Build.0 = Release|x64
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Release|x86.ActiveCfg = Release|Win32
+		{C4A6832A-9AE5-4AA5-A424-15CF8179F318}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {90C55F7D-8015-422B-A5E1-F1DC4F34418A}
+	EndGlobalSection
+EndGlobal

Win11DisableRoundedCorners/Resource.rc

@@ -0,0 +1,100 @@
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (United States) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "#include ""winres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION 1,0,0,1
+ PRODUCTVERSION 1,0,0,1
+ FILEFLAGSMASK 0x3fL
+#ifdef _DEBUG
+ FILEFLAGS 0x1L
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS 0x40004L
+ FILETYPE 0x1L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "CompanyName", "VALINET Solutions SRL"
+            VALUE "FileDescription", "Disables rounded corners in Windows 11"
+            VALUE "FileVersion", "1.0.0.1"
+            VALUE "InternalName", "Win11DisableRoundedCorners.exe"
+            VALUE "LegalCopyright", "Copyright (C) 2006-2021 VALINET Solutions SRL. All rights reserved."
+            VALUE "OriginalFilename", "Win11Dis.exe"
+            VALUE "ProductName", "Win11DisableRoundedCorners"
+            VALUE "ProductVersion", "1.0.0.1"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+#endif    // English (United States) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
+

Win11DisableRoundedCorners/Win11DisableRoundedCorners.c

@@ -0,0 +1,246 @@
+#undef UNICODE
+#include <Windows.h>
+#include <valinet/pdb/pdb.h>
+#include <valinet/utility/memmem.h>
+#include <valinet/utility/takeown.h>
+
+int main(int argc, char** argv)
+{
+    char szTaskkill[MAX_PATH];
+    ZeroMemory(
+        szTaskkill,
+        (MAX_PATH) * sizeof(char)
+    );
+    szTaskkill[0] = '\"';
+    GetSystemDirectoryA(
+        szTaskkill + sizeof(char),
+        MAX_PATH
+    );
+    strcat_s(
+        szTaskkill,
+        MAX_PATH,
+        "\\taskkill.exe\" /f /im dwm.exe"
+    );
+
+    char szPath[_MAX_PATH];
+    ZeroMemory(
+        szPath,
+        (_MAX_PATH) * sizeof(char)
+    );
+    GetModuleFileNameA(
+        GetModuleHandle(NULL),
+        szPath,
+        _MAX_PATH
+    );
+    PathStripPathA(szPath);
+
+    char szOriginalDWM[_MAX_PATH];
+    ZeroMemory(
+        szOriginalDWM,
+        (_MAX_PATH) * sizeof(char)
+    );
+    GetSystemDirectoryA(
+        szOriginalDWM,
+        MAX_PATH
+    );
+    strcat_s(
+        szOriginalDWM,
+        MAX_PATH,
+        "\\uDWM_win11drc.bak"
+    );
+
+    char szModifiedDWM[_MAX_PATH];
+    ZeroMemory(
+        szModifiedDWM,
+        (_MAX_PATH) * sizeof(char)
+    );
+    if (!strcmp(szPath, "Win11RestoreRoundedCorners.exe"))
+    {
+        GetSystemDirectoryA(
+            szModifiedDWM,
+            MAX_PATH
+        );    
+        strcat_s(
+            szModifiedDWM,
+            MAX_PATH,
+            "\\uDWMm.dll"
+        );
+    }
+    else
+    {
+        GetModuleFileNameA(
+            GetModuleHandle(NULL),
+            szModifiedDWM,
+            _MAX_PATH
+        );
+        PathRemoveFileSpecA(szModifiedDWM);
+        strcat_s(
+            szModifiedDWM,
+            MAX_PATH,
+            "\\uDWM.dll"
+        );
+    }
+
+    char szDWM[MAX_PATH];
+    ZeroMemory(
+        szDWM,
+        (MAX_PATH) * sizeof(char)
+    );
+    GetSystemDirectoryA(
+        szDWM,
+        MAX_PATH
+    );
+    strcat_s(
+        szDWM,
+        MAX_PATH,
+        "\\uDWM.dll"
+    );
+
+    if (!strcmp(szPath, "Win11RestoreRoundedCorners.exe"))
+    {
+        DeleteFileA(szModifiedDWM);
+        if (!MoveFileA(szDWM, szModifiedDWM))
+        {
+            printf("Unable to restore DWM.\n");
+            _getch();
+            return 1;
+        }
+        if (!MoveFileA(szOriginalDWM, szDWM))
+        {
+            printf("Unable to restore DWM.\n");
+            _getch();
+            return 2;
+        }
+    }
+    else
+    {
+        if (!CopyFileA(szDWM, szModifiedDWM, FALSE))
+        {
+            printf(
+                "Temporary file copy failed. Make sure the application has write "
+                "access to the folder it runs from.\n"
+            );
+            _getch();
+            return 1;
+        }
+        if (VnDownloadSymbols(
+            NULL,
+            szModifiedDWM,
+            szModifiedDWM,
+            _MAX_PATH
+        ))
+        {
+            printf(
+                "Unable to download symbols. Make sure you have a working Internet "
+                "connection.\n"
+            );
+            _getch();
+            return 2;
+        }
+        DWORD addr[1] = { 0 };
+        char* name[1] = { "CTopLevelWindow::GetEffectiveCornerStyle" };
+        if (VnGetSymbols(
+            szModifiedDWM,
+            addr,
+            name,
+            1
+        ))
+        {
+            printf("Unable to determine function address.\n");
+            _getch();
+            return 3;
+        }
+        printf("Function address is: 0x%x\n", addr[0]);
+        DeleteFile(szModifiedDWM);
+        PathRemoveFileSpecA(szModifiedDWM);
+        strcat_s(
+            szModifiedDWM,
+            MAX_PATH,
+            "\\uDWM.dll"
+        );
+        HANDLE hFile = CreateFileA(
+            szModifiedDWM,
+            GENERIC_READ | GENERIC_WRITE,
+            FILE_SHARE_READ,
+            NULL,
+            OPEN_EXISTING,
+            FILE_ATTRIBUTE_NORMAL,
+            0
+        );
+        if (!hFile)
+        {
+            printf("Unable to open system file.\n");
+            _getch();
+            return 4;
+        }
+        HANDLE hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
+        if (hFileMapping == 0)
+        {
+            printf("Unable to create file mapping.\n");
+            _getch();
+            return 5;
+        }
+        char* lpFileBase = MapViewOfFile(hFileMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
+        if (lpFileBase == 0)
+        {
+            printf("Unable to memory map system file.\n");
+            _getch();
+            return 6;
+        }
+        char szPattern[9] = { 0x8B, 0xC1, 0x48, 0x83, 0xC4, 0x20, 0x5B, 0xC3 };
+        char szPayload[2] = { 0x31, 0xC0 }; // xor eax, eax
+        char* off = memmem(lpFileBase + addr[0], 1000, szPattern, 8);
+        if (!off)
+        {
+            printf("Unable to find pattern in file.\n");
+            _getch();
+            return 7;
+        }
+        memcpy(off, szPayload, sizeof(szPayload));
+        UnmapViewOfFile(lpFileBase);
+        CloseHandle(hFileMapping);
+        CloseHandle(hFile);
+        if (!VnTakeOwnership(szDWM))
+        {
+            printf("Unable to take ownership of system file.\n");
+            _getch();
+            return 7;
+        }
+        DeleteFileA(szOriginalDWM);
+        if (!MoveFileA(szDWM, szOriginalDWM))
+        {
+            printf("Unable to backup system file.\n");
+            _getch();
+            return 7;
+        }
+        if (!CopyFileA(szModifiedDWM, szDWM, FALSE))
+        {
+            printf("Unable to replace system file.\n");
+            _getch();
+            return 1;
+        }
+        DeleteFileA(szModifiedDWM);
+    }
+    STARTUPINFO si = { sizeof(si) };
+    PROCESS_INFORMATION pi;
+    BOOL b = CreateProcessA(
+        NULL,
+        szTaskkill,
+        NULL,
+        NULL,
+        TRUE,
+        CREATE_UNICODE_ENVIRONMENT,
+        NULL,
+        NULL,
+        &si,
+        &pi
+    );
+    WaitForSingleObject(pi.hProcess, INFINITE);
+    Sleep(1000);
+    if (!strcmp(szPath, "Win11RestoreRoundedCorners.exe"))
+    {
+        DeleteFileA(szModifiedDWM);
+    }
+    printf("Operation successful.\n");
+	return 0;
+}