commit 4f660b13982b4eaf3c96b85988161d3fc8feb925
Author: mykola2312 <49044616+mykola2312@users.noreply.github.com>
Date:   Sat Feb 27 17:34:28 2021 +0200

    27.02.2021: win32ctrl initial commit.

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..acd792a
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.18)
+project(win32ctrl)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+set(SOURCES
+    win32ctrl.cpp
+    win32util.cpp
+)
+
+set(HEADERS
+    win32ctrl.h
+    win32util.h
+)
+
+add_library(win32ctrl SHARED ${SOURCES} ${HEADERS})
+target_include_directories(win32ctrl PUBLIC
+    ${CMAKE_CURRENT_SOURCE_DIR}
+)
+target_link_libraries(win32ctrl PRIVATE
+    comctl32
+)
diff --git a/win32ctrl.cpp b/win32ctrl.cpp
new file mode 100644
index 0000000..7bb7a21
--- /dev/null
+++ b/win32ctrl.cpp
@@ -0,0 +1,511 @@
+#include "win32ctrl.h"
+#include "win32util.h"
+#include <commctrl.h>
+#include <stdint.h>
+#include <string.h>
+#include <strsafe.h>
+#include <exception>
+#include <memory>
+
+/* AppException */
+
+AppException::AppException(AppMonitor* app,
+    const std::string& text)
+{
+    m_pApp = app;
+    m_Text = text;
+    m_dwError = GetLastError();
+}
+
+static char s_szExcBuf[256] = {0};
+
+const char* AppException::what() const noexcept
+{
+    StringCchPrintfA(s_szExcBuf, 256, "AppMonitor#%05d: %s",
+        GetApp()->GetAppProcessId(), m_Text.c_str());
+    return s_szExcBuf;
+}
+
+/* AppMonitor */
+
+void AppMonitor::Init()
+{
+    InitCommonControls();
+}
+
+AppMonitor::AppMonitor()
+    : m_ExePath(L"")
+{
+    m_hAppProcess = INVALID_HANDLE_VALUE;
+    m_dwPid = 0;
+    m_bWow64 = FALSE;
+}
+
+AppMonitor::AppMonitor(const std::wstring& app)
+    : m_ExePath(app)
+{
+    m_hAppProcess = INVALID_HANDLE_VALUE;
+    m_dwPid = 0;
+    m_bWow64 = FALSE;
+}
+
+AppMonitor::~AppMonitor()
+{
+    if (m_hAppProcess != INVALID_HANDLE_VALUE)
+        CloseHandle(m_hAppProcess);
+}
+
+struct _enumapp_s {
+    AppMonitor* m_pMonitor;
+    AppMonitor::EnumFunc m_Func;
+};
+
+BOOL CALLBACK _EnumAppWindows(HWND hWnd, LPARAM lParam)
+{
+    AppMonitor* app = (AppMonitor*)lParam;
+
+    DWORD dwPid = 0;
+    GetWindowThreadProcessId(app->m_Tmp.m_hWnd
+        ? app->m_Tmp.m_hWnd : hWnd, &dwPid);
+    if (dwPid && dwPid != app->GetAppProcessId())
+        return TRUE;
+
+    return app->m_Tmp.m_Func(app, hWnd);
+}
+
+void AppMonitor::EnumAppWindows(EnumFunc func)
+{
+    m_Tmp.m_hWnd = NULL;
+    m_Tmp.m_Func = func;
+
+    EnumWindows(_EnumAppWindows, (LPARAM)this);
+}
+
+void AppMonitor::EnumAppControls(HWND hWnd, EnumFunc func)
+{
+    m_Tmp.m_hWnd = hWnd;
+    m_Tmp.m_Func = func;
+
+    EnumChildWindows(hWnd, _EnumAppWindows, (LPARAM)this);
+}
+
+HWND AppMonitor::FindAppWindow(const std::string& wndClass)
+{
+    m_Tmp.m_hWnd = NULL;
+    m_Tmp.m_Class = wndClass;
+
+    EnumAppWindows(
+        [](AppMonitor* app, HWND hWnd) {
+            if (app->GetWindowClass(hWnd) == app->m_Tmp.m_Class)
+            {
+                app->m_Tmp.m_hWnd = hWnd;
+                return false;
+            }
+
+            return true;
+        }
+    );
+
+    return m_Tmp.m_hWnd;
+}
+
+bool AppMonitor::StartApp(const std::wstring& cmdLine)
+{
+    if (m_ExePath.empty())
+        throw AppException(this, "m_ExePath.empty()");
+
+    auto pszCmdLine = std::make_unique<wchar_t[]>(MAX_CMDLINE);
+    StringCchPrintfW(pszCmdLine.get(), MAX_CMDLINE, L"\"%s\" %s",
+        m_ExePath.c_str(), cmdLine.c_str());
+
+    PROCESS_INFORMATION pi;
+    STARTUPINFOW si;
+
+    ZeroMemory(&pi, sizeof(pi));
+    ZeroMemory(&si, sizeof(si));
+
+    si.cb = sizeof(si);
+    BOOL bCreated = CreateProcessW(m_ExePath.c_str(), pszCmdLine.get(),
+        NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
+    if (!bCreated)
+        return false;
+
+    m_hAppProcess = pi.hProcess;
+    m_dwPid = pi.dwProcessId;
+
+    if (!IsWow64Process(m_hAppProcess, &m_bWow64))
+        m_bWow64 = FALSE;
+
+    CloseHandle(pi.hThread);
+    return true;
+}
+
+void AppMonitor::CloseApp()
+{
+    EnumAppWindows(
+        [](AppMonitor* app, HWND hWnd) {
+            SendMessage(hWnd, WM_CLOSE, 0, 0);
+            return true;
+        }
+    );
+
+    CloseHandle(m_hAppProcess);
+    m_hAppProcess = INVALID_HANDLE_VALUE;
+}
+
+void AppMonitor::Terminate()
+{
+    TerminateProcess(m_hAppProcess, 0);
+    CloseHandle(m_hAppProcess);
+    m_hAppProcess = INVALID_HANDLE_VALUE;
+}
+
+bool AppMonitor::IsAppRunning() const
+{
+    DWORD dwWait = WaitForSingleObject(m_hAppProcess, 0);
+    if (dwWait != WAIT_OBJECT_0)
+        return false;
+
+    return true;
+}
+
+bool AppMonitor::IsWow64() const
+{
+    return !!m_bWow64;
+}
+
+bool AppMonitor::WaitAppIdle(DWORD dwInterval)
+{
+    return WaitForInputIdle(GetAppProcess(), dwInterval) != 0;
+}
+
+void AppMonitor::MonitorSetup()
+{
+    EnumAppWindows(
+        [](AppMonitor* app, HWND hWnd) {
+            app->OnAppWindow(hWnd);
+            return true;
+        }
+    );
+}
+
+void AppMonitor::OnAppWindow(HWND hWnd)
+{
+}
+
+void AppMonitor::SetExePath(const std::wstring& exePath)
+{
+    m_ExePath = exePath;
+}
+
+std::string AppMonitor::GetWindowClass(HWND hWnd)
+{
+    char szClass[64] = {0};
+    GetClassNameA(hWnd, szClass, 64);
+    return std::string(szClass);
+}
+
+HWND AppMonitor::GetChild(HWND hWnd, const std::string& wndClass,
+    const std::wstring& wndText)
+{
+    return FindWindowExW(hWnd, NULL, TextToWchar(wndClass).c_str(),
+        wndText.empty() ? NULL : wndText.c_str());
+}
+
+AppMem AppMonitor::MemAlloc(unsigned uLen)
+{
+    void* pThisMem;
+    void* pAppMem;
+
+    pThisMem = (char*)malloc(uLen);
+    if (!pThisMem)
+        throw AppException(this, "!malloc");
+    memset(pThisMem, '\0', uLen);
+    pAppMem = VirtualAllocEx(m_hAppProcess,
+        NULL, uLen, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+    if (!pAppMem)
+    {
+        free(pThisMem);
+        throw AppException(this, "!VirtualAllocEx");
+    }
+    else if (IsWow64() && (uintptr_t)pAppMem > 0xFFFFFFFF)
+    {
+        free(pThisMem);
+        throw AppException(this, "WOW64 VirtualAllocEx >4GB addr");
+    }
+
+    return AppMem(pThisMem, pAppMem, uLen);
+}
+
+void AppMonitor::MemFree(AppMem& mem)
+{
+    free(mem.This());
+    VirtualFreeEx(m_hAppProcess, mem.App(), 0, MEM_RELEASE);
+    mem = AppMem();
+}
+
+void AppMonitor::MemWriteApp(const AppMem& mem)
+{
+    SIZE_T szTmp = mem.Size();
+    if(!WriteProcessMemory(m_hAppProcess, mem.App(),
+        mem.This(), mem.Size(), &szTmp))
+    {
+        throw AppException(this, "!WriteProcessMemory");
+    }
+}
+
+void AppMonitor::MemReadApp(const AppMem& mem)
+{
+    SIZE_T szTmp = mem.Size();
+    if(!ReadProcessMemory(m_hAppProcess, mem.App(),
+        mem.This(), mem.Size(), &szTmp))
+    {
+        throw AppException(this, "!ReadProcessMemory");
+    }
+}
+
+bool AppMonitor::AppMessage(HWND hWnd, UINT uMsg,
+    WPARAM wParam, LPARAM lParam,
+    DWORD_PTR* pResult,
+    unsigned uTimeOut)
+{
+    DWORD_PTR dwResult = 0;
+    LRESULT lResult;
+
+    if (IsWindowUnicode(hWnd))
+    {
+        lResult = SendMessageTimeoutW(
+            hWnd, uMsg, wParam, lParam,
+            SMTO_ABORTIFHUNG, uTimeOut,
+            &dwResult);
+    }
+    else
+    {
+        lResult = SendMessageTimeoutA(
+            hWnd, uMsg, wParam, lParam,
+            SMTO_ABORTIFHUNG, uTimeOut,
+            &dwResult);
+    }
+
+    if (pResult) *pResult = dwResult;
+
+    if (lResult) // ок
+        return true;
+    else if (GetLastError() == ERROR_TIMEOUT) // таймаут
+        throw AppTimeOut(this, uMsg);
+    else // ошибка
+    {
+        throw AppException(this, "!SendMessageTimeoutW");
+    }
+}
+
+void AppMonitor::AppPostMessage(HWND hWnd, UINT uMsg,
+    WPARAM wParam, LPARAM lParam)
+{
+    if (!hWnd)
+        throw AppException(this, "!hWnd");
+    if (!PostMessageW(hWnd, uMsg, wParam, lParam))
+        throw AppException(this, "!PostMessageW");
+}
+
+AppMem AppMonitor::NewString(HWND hWnd, DWORD dwChars)
+{
+    if (!dwChars) dwChars = 256;
+    return MemAlloc(IsWindowUnicode(hWnd)
+        ? sizeof(wchar_t) * dwChars
+        : sizeof(char) * dwChars
+    );
+}
+
+std::wstring AppMonitor::ReadString(HWND hWnd, const AppMem& str)
+{
+    std::wstring ret;
+    MemReadApp(str);
+
+    if (IsWindowUnicode(hWnd))
+    {
+        wchar_t* pszText = (wchar_t*)str.This();
+        pszText[(uint64_t)(str.Size()-1)/sizeof(wchar_t)] = L'\0';
+        ret = std::wstring(pszText);
+    }
+    else
+    {
+        char* pszText = (char*)str.This();
+        pszText[(uint64_t)(str.Size()-1)/sizeof(char)] = '\0';
+        ret = AnsiToWchar(pszText);
+    }
+
+    return ret;
+}
+
+std::wstring AppMonitor::GetWindowTextStr(HWND hWnd)
+{
+    auto pszText = std::make_unique<wchar_t[]>(MAX_WM_TEXT);
+
+    SetLastError(0);
+    int iLen = GetWindowTextW(hWnd, pszText.get(), MAX_WM_TEXT);
+    if (iLen < 0)
+        throw AppException(this, "!GetWindowTextW");
+
+    pszText[iLen] = L'\0';
+    return std::wstring(pszText.get());
+}
+
+std::wstring AppMonitor::GetControlTextStr(HWND hWnd)
+{
+    DWORD_PTR dwLength = 0, dwRead = 0;
+    AppMessage(hWnd, WM_GETTEXTLENGTH, 0, 0,
+        &dwLength);
+    if (dwLength <= 0)
+        return L"";
+
+    std::wstring ret;
+    if (IsWindowUnicode(hWnd))
+    {
+        auto pszText = std::make_unique<wchar_t[]>(dwLength * 2);
+        AppMessage(hWnd, WM_GETTEXT,
+            (WPARAM)dwLength+1, (LPARAM)pszText.get(),
+            &dwRead);
+        //dwRead = (DWORD_PTR)SendMessage(hWnd, WM_GETTEXT,
+        //  (WPARAM)dwLength+1, (LPARAM)pszText.get());
+        pszText[dwRead] = L'\0';
+        ret = std::wstring(pszText.get());
+    }
+    else
+    {
+        auto pszText = std::make_unique<char[]>(dwLength * 2);
+        AppMessage(hWnd, WM_GETTEXT,
+            (WPARAM)dwLength+1, (LPARAM)pszText.get(),
+            &dwRead);
+        //dwRead = (DWORD_PTR)SendMessage(hWnd, WM_GETTEXT,
+        //  (WPARAM)dwLength+1, (LPARAM)pszText.get());
+        pszText[dwRead] = '\0';
+        ret = AnsiToWchar(std::string(pszText.get()));
+    }
+
+    return ret;
+}
+
+DWORD_PTR AppMonitor::TV_GetNextItem(HWND hTree, DWORD dwFlags,
+    DWORD_PTR dwItem)
+{
+    DWORD_PTR dwRetItem = 0;
+    AppMessage(hTree, TVM_GETNEXTITEM,
+        (WPARAM)dwFlags, dwItem, &dwRetItem);
+    return dwRetItem;
+}
+
+typedef struct {
+    uint32_t mask;
+    uint32_t hItem;
+    uint32_t state;
+    uint32_t stateMask;
+    uint32_t dwText;
+    int32_t cchTextMax;
+    int32_t iImage;
+    int32_t iSelectedImage;
+    int32_t cChildren;
+    uint32_t lParam;
+} tvitem32_t;
+
+std::tuple<std::wstring,int>
+AppMonitor::TV_GetItem32(HWND hTree, DWORD_PTR dwItem)
+{
+    DWORD_PTR dwRet;
+    AppMem item = MemAlloc(sizeof(tvitem32_t));
+    AppMem str = NewString(hTree, MAX_TV_TEXT);
+
+    std::wstring text = L"";
+    int icon = 0;
+
+    tvitem32_t* tvItem = item.As<tvitem32_t>();
+    tvItem->mask = TVIF_HANDLE | TVIF_TEXT | TVIF_IMAGE;
+    tvItem->hItem = (uint32_t)dwItem;
+    tvItem->cchTextMax = MAX_TV_TEXT;
+    tvItem->dwText = (uint32_t)((uintptr_t)str.App());
+
+    MemWriteApp(item);
+    AppMessage(hTree, IsWindowUnicode(hTree)
+        ? TVM_GETITEMW : TVM_GETITEMA,
+        0, (LPARAM)item.App(), &dwRet
+    );
+    if ((BOOL)dwRet)
+    {
+        MemReadApp(item);
+
+        text = ReadString(hTree, str);
+        icon = tvItem->iImage;
+
+        MemFree(item);
+        MemFree(str);
+    }
+    else
+    {
+        MemFree(item);
+        MemFree(str);
+        throw AppException(this, "TVM_GETITEM !dwRet");
+    }
+
+    return std::make_tuple(text, icon);
+}
+
+typedef struct {
+    uint32_t mask;
+    uint64_t hItem;
+    uint32_t state;
+    uint32_t stateMask;
+    uint64_t dwText;
+    int32_t cchTextMax;
+    int32_t iImage;
+    int32_t iSelectedImage;
+    int32_t cChildren;
+    uint64_t lParam;
+} tvitem64_t;
+
+std::tuple<std::wstring,int>
+AppMonitor::TV_GetItem64(HWND hTree, DWORD_PTR dwItem)
+{
+    DWORD_PTR dwRet;
+    AppMem item = MemAlloc(sizeof(tvitem64_t));
+    AppMem str = NewString(hTree, MAX_TV_TEXT);
+
+    std::wstring text = L"";
+    int icon = 0;
+
+    tvitem64_t* tvItem = item.As<tvitem64_t>();
+    tvItem->mask = TVIF_HANDLE | TVIF_TEXT | TVIF_IMAGE;
+    tvItem->hItem = (uint64_t)dwItem;
+    tvItem->cchTextMax = MAX_TV_TEXT;
+    tvItem->dwText = (uint64_t)((uintptr_t)str.App());
+
+    MemWriteApp(item);
+    AppMessage(hTree, IsWindowUnicode(hTree)
+        ? TVM_GETITEMW : TVM_GETITEMA,
+        0, (LPARAM)item.App(), &dwRet
+    );
+    if ((BOOL)dwRet)
+    {
+        MemReadApp(item);
+
+        text = ReadString(hTree, str);
+        icon = tvItem->iImage;
+
+        MemFree(item);
+        MemFree(str);
+    }
+    else
+    {
+        MemFree(item);
+        MemFree(str);
+        throw AppException(this, "TVM_GETITEM !dwRet");
+    }
+
+    return std::make_tuple(text, icon);
+}
+
+std::tuple<std::wstring,int>
+AppMonitor::TV_GetItem(HWND hTree, DWORD_PTR dwItem)
+{
+    if (IsWow64()) return TV_GetItem32(hTree, dwItem);
+    else return TV_GetItem64(hTree, dwItem);
+}
diff --git a/win32ctrl.h b/win32ctrl.h
new file mode 100644
index 0000000..635d720
--- /dev/null
+++ b/win32ctrl.h
@@ -0,0 +1,170 @@
+#ifndef __WIN32CTRL_H
+#define __WIN32CTRL_H
+
+#include <Windows.h>
+#include <functional>
+#include <exception>
+#include <string>
+#include <tuple>
+
+class AppMem
+{
+public:
+    AppMem(void* pThisMem = NULL, void* pAppMem = NULL, size_t uLen = 0)
+        : m_pThisMem(pThisMem), m_pAppMem(pAppMem), m_uMemLen(uLen)
+    {
+    }
+
+    inline void Zero()
+    {
+        if (m_pThisMem)
+            ZeroMemory(m_pThisMem, m_uMemLen);
+    }
+
+    inline void* This() const { return m_pThisMem; }
+    inline void* App() const { return m_pAppMem; }
+    inline unsigned Size() const { return m_uMemLen; }
+
+    template<typename T>
+    T* As()
+    {
+        return (T*)This();
+    }
+private:
+    void* m_pThisMem;
+    void* m_pAppMem;
+    unsigned m_uMemLen;
+};
+
+class AppMonitor;
+
+class AppException : public std::exception
+{
+public:
+    AppException(AppMonitor* app,
+        const std::string& text);
+
+    virtual AppMonitor* GetApp() const
+    {
+        return m_pApp;
+    }
+
+    virtual DWORD GetError() const
+    {
+        return m_dwError;
+    }
+
+    virtual const char* what() const noexcept;
+private:
+    AppMonitor* m_pApp;
+    std::string m_Text;
+    DWORD m_dwError;
+};
+
+class AppTimeOut : public AppException
+{
+public:
+    AppTimeOut(AppMonitor* app, UINT uMsg)
+        : AppException(app, "[AppTimeOut]"),
+        m_uMsg(uMsg)
+    {
+    }
+
+    virtual UINT GetMessage() const
+    {
+        return m_uMsg;
+    }
+private:
+    UINT m_uMsg;
+};
+
+#define MAX_CMDLINE 1024
+#define APP_MSG_TIMEOUT 60*1000
+#define MAX_WM_TEXT 4096
+#define MAX_TV_TEXT 256
+
+class AppMonitor
+{
+public:
+    static void Init();
+
+    AppMonitor();
+    AppMonitor(const std::wstring& exePath);
+    virtual ~AppMonitor();
+
+    typedef std::function<bool(AppMonitor*, HWND)> EnumFunc;
+
+    friend BOOL CALLBACK _EnumAppWindows(HWND, LPARAM);
+    void EnumAppWindows(EnumFunc func);
+    void EnumAppControls(HWND hWnd, EnumFunc func);
+    HWND FindAppWindow(const std::string& wndClass);
+
+    virtual HANDLE GetAppProcess() const
+    {
+        return m_hAppProcess;
+    }
+
+    virtual DWORD GetAppProcessId() const
+    {
+        return m_dwPid;
+    }
+
+    virtual bool StartApp(const std::wstring& cmdLine);
+    virtual void CloseApp();
+    virtual void Terminate();
+    virtual bool IsAppRunning() const;
+    virtual bool IsWow64() const;
+    virtual bool WaitAppIdle(DWORD dwInterval = INFINITE);
+
+    virtual void MonitorSetup();
+protected:
+    virtual void OnAppWindow(HWND hWnd);
+    void SetExePath(const std::wstring& exe);
+public:
+    virtual std::string GetWindowClass(HWND hWnd);
+    virtual HWND GetChild(HWND hWnd, const std::string& wndClass,
+        const std::wstring& wndText = L"");
+
+    virtual AppMem MemAlloc(unsigned uLen);
+    virtual void MemFree(AppMem& mem);
+    virtual void MemWriteApp(const AppMem& mem);
+    virtual void MemReadApp(const AppMem& mem);
+
+    virtual bool AppMessage(HWND hWnd, UINT uMsg,
+        WPARAM wParam, LPARAM lParam,
+        DWORD_PTR* pResult = NULL,
+        unsigned uTimeOut = APP_MSG_TIMEOUT);
+    virtual void AppPostMessage(HWND hWnd, UINT uMsg,
+        WPARAM wParam, LPARAM lParam);
+
+    virtual AppMem NewString(HWND hWnd, DWORD dwChars);
+    virtual std::wstring ReadString(HWND hWnd, const AppMem& str);
+
+    virtual std::wstring GetWindowTextStr(HWND hWnd);
+    virtual std::wstring GetControlTextStr(HWND hWnd);
+
+    virtual DWORD_PTR TV_GetNextItem(HWND hTree, DWORD dwFlags,
+        DWORD_PTR dwItem = 0);
+private:
+    std::tuple<std::wstring,int>
+        TV_GetItem32(HWND hTree, DWORD_PTR dwItem);
+    std::tuple<std::wstring,int>
+        TV_GetItem64(HWND hTree, DWORD_PTR dwItem);
+public:
+    virtual std::tuple<std::wstring,int>
+        TV_GetItem(HWND hTree, DWORD_PTR dwItem);
+private:
+    std::wstring m_ExePath;
+
+    HANDLE m_hAppProcess;
+    DWORD m_dwPid;
+    BOOL m_bWow64;
+
+    struct _app_tmp_s {
+        EnumFunc m_Func = NULL;
+        std::string m_Class;
+        HWND m_hWnd = NULL;
+    } m_Tmp;
+};
+
+#endif
diff --git a/win32util.cpp b/win32util.cpp
new file mode 100644
index 0000000..87fa7b9
--- /dev/null
+++ b/win32util.cpp
@@ -0,0 +1,190 @@
+#include "win32util.h"
+#include <io.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <iostream>
+#include <memory>
+
+std::wstring TextToWchar(const std::string& text)
+{
+    size_t uWcharLen = MultiByteToWideChar(CP_UTF8, 0,
+        text.c_str(), text.size(), NULL, 0);
+    auto pszWchar = std::make_unique<wchar_t[]>(uWcharLen+1);
+    MultiByteToWideChar(CP_UTF8, 0, text.c_str(), text.size(),
+        pszWchar.get(), uWcharLen);
+    pszWchar[uWcharLen] = L'\0';
+    return std::wstring(pszWchar.get());
+}
+
+std::string WcharToText(const std::wstring& text)
+{
+    size_t uMbsLen = WideCharToMultiByte(CP_UTF8, 0,
+        text.c_str(), text.size(), NULL, 0, NULL, NULL);
+    auto pszChar = std::make_unique<char[]>(uMbsLen +1);
+    WideCharToMultiByte(CP_UTF8, 0, text.c_str(), text.size(),
+        pszChar.get(), uMbsLen, NULL, NULL);
+    pszChar[uMbsLen] = '\0';
+    return std::string(pszChar.get());
+}
+
+std::wstring AnsiToWchar(const std::string& text, int cp)
+{
+    size_t uWcharLen = MultiByteToWideChar(cp, 0,
+        text.c_str(), text.size(), NULL, 0);
+    auto pszWchar = std::make_unique<wchar_t[]>(uWcharLen +1);
+    MultiByteToWideChar(cp, 0, text.c_str(), text.size(),
+        pszWchar.get(), uWcharLen);
+    pszWchar[uWcharLen] = L'\0';
+    return std::wstring(pszWchar.get());
+}
+
+
+std::string WcharToAnsi(const std::wstring& text, int cp)
+{
+    size_t uMbsLen = WideCharToMultiByte(cp, 0,
+        text.c_str(), text.size(), NULL, 0, NULL, NULL);
+    auto pszChar = std::make_unique<char[]>(uMbsLen +1);
+    WideCharToMultiByte(cp, 0, text.c_str(), text.size(),
+        pszChar.get(), uMbsLen, NULL, NULL);
+    pszChar[uMbsLen] = '\0';
+    return std::string(pszChar.get());
+}
+
+struct _findwnd_s {
+    DWORD m_dwPid;
+    const char* m_pClass;
+    HWND m_hWnd;
+    DWORD m_dwTid;
+};
+
+static BOOL CALLBACK _CheckWindow(HWND hWnd, LPARAM lParam)
+{
+    struct _findwnd_s* wnd = (struct _findwnd_s*)lParam;
+    char szClassName[64] = {0};
+
+    DWORD dwPid;
+    DWORD dwTid = GetWindowThreadProcessId(hWnd, &dwPid);
+    if (dwPid != wnd->m_dwPid)
+        return TRUE;
+
+    GetClassNameA(hWnd, szClassName, 64);
+    if (!strcmp(szClassName, wnd->m_pClass))
+    {
+        wnd->m_hWnd = hWnd;
+        wnd->m_dwTid = dwTid;
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+bool FindProcessWindow(DWORD dwPid, const char* pClass,
+    HWND& hWnd, DWORD& uiThread)
+{
+    struct _findwnd_s wnd = { 0 };
+
+    wnd.m_dwPid = dwPid;
+    wnd.m_pClass = pClass;
+    wnd.m_hWnd = NULL;
+
+    EnumWindows(_CheckWindow, (LPARAM)&wnd);
+    if (wnd.m_hWnd)
+    {
+        hWnd = wnd.m_hWnd;
+        uiThread = wnd.m_dwTid;
+        return true;
+    }
+
+    return false;
+}
+
+bool ReconnectIO(bool OpenNewConsole)
+{
+    int hConHandle;
+    intptr_t iStdHandle;
+    FILE *fp;
+    bool MadeConsole;
+
+    MadeConsole=false;
+    if(!AttachConsole(ATTACH_PARENT_PROCESS))
+    {
+        if(!OpenNewConsole)
+            return false;
+
+        MadeConsole=true;
+        if(!AllocConsole())
+            return false;
+    }
+
+    iStdHandle = (intptr_t)GetStdHandle(STD_OUTPUT_HANDLE);
+    hConHandle = _open_osfhandle(iStdHandle, _O_TEXT);
+    fp = _fdopen( hConHandle, "w" );
+    *stdout = *fp;
+    setvbuf( stdout, NULL, _IONBF, 0 );
+
+    iStdHandle = (intptr_t)GetStdHandle(STD_INPUT_HANDLE);
+    hConHandle = _open_osfhandle(iStdHandle, _O_TEXT);
+    fp = _fdopen( hConHandle, "r" );
+    *stdin = *fp;
+    setvbuf( stdin, NULL, _IONBF, 0 );
+
+    iStdHandle = (intptr_t)GetStdHandle(STD_ERROR_HANDLE);
+    hConHandle = _open_osfhandle(iStdHandle, _O_TEXT);
+    fp = _fdopen( hConHandle, "w" );
+    *stderr = *fp;
+    setvbuf( stderr, NULL, _IONBF, 0 );
+
+    std::ios_base::sync_with_stdio();
+
+    return MadeConsole;
+}
+
+listdir ListDirectory(const std::wstring& path)
+{
+    auto pFind = std::make_unique<WIN32_FIND_DATAW>();
+    std::wstring findPath = path + L"\\*";
+
+    std::vector<std::wstring> files, dirs;
+    HANDLE hFind = FindFirstFileW(findPath.c_str(), pFind.get());
+    if (hFind)
+    {
+        do {
+            if (!wcscmp(pFind->cFileName, L"."))
+                continue;
+            if (!wcscmp(pFind->cFileName, L".."))
+                continue;
+
+            if (pFind->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+                dirs.emplace_back(pFind->cFileName);
+            else files.emplace_back(pFind->cFileName);
+        } while (FindNextFileW(hFind, pFind.get()));
+        FindClose(hFind);
+    }
+
+    return std::make_tuple(files, dirs);
+}
+
+uint64_t GetDirectorySize(const std::wstring& path)
+{
+    uint64_t uDirSize = 0;
+    auto [files, dirs] = ListDirectory(path);
+
+    for (auto& file : files)
+    {
+        LARGE_INTEGER fileSize = {0};
+        HANDLE hFile = CreateFileW((path + L"\\" + file).c_str(),
+            GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
+            FILE_ATTRIBUTE_NORMAL, NULL);
+        if (hFile == INVALID_HANDLE_VALUE)
+            continue;
+        if (GetFileSizeEx(hFile, &fileSize))
+            uDirSize += fileSize.QuadPart;
+        CloseHandle(hFile);
+    }
+
+    for (auto& dir : dirs)
+        uDirSize += GetDirectorySize(path + L"\\" + dir);
+
+    return uDirSize;
+}
diff --git a/win32util.h b/win32util.h
new file mode 100644
index 0000000..6ce61a2
--- /dev/null
+++ b/win32util.h
@@ -0,0 +1,28 @@
+#ifndef __WIN32UTIL_H
+#define __WIN32UTIL_H
+
+#include <Windows.h>
+#include <stdint.h>
+#include <string>
+#include <vector>
+#include <tuple>
+
+std::wstring TextToWchar(const std::string& text);
+std::string WcharToText(const std::wstring& text);
+std::wstring AnsiToWchar(const std::string& text, int cp = CP_THREAD_ACP);
+std::string WcharToAnsi(const std::wstring& text, int cp = CP_THREAD_ACP);
+
+bool FindProcessWindow(DWORD dwPid, const char* pClass,
+    HWND& hWnd, DWORD& uiThread);
+
+bool ReconnectIO(bool OpenNewConsole);
+
+using listdir = std::tuple<
+    std::vector<std::wstring>,
+    std::vector<std::wstring>
+>;
+
+listdir ListDirectory(const std::wstring& path);
+uint64_t GetDirectorySize(const std::wstring& path);
+
+#endif