File browser (MODIFIED)

#include <windows.h>
#include "resource.h"
#include <tchar.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow )
{
    MSG  msg ;
    HWND hwnd;
    WNDCLASS wc;

    wc.style         = CS_HREDRAW | CS_VREDRAW;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.lpszClassName = TEXT( "Window" );
    wc.hInstance     = hInstance ;
    wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
    wc.lpszMenuName  = MAKEINTRESOURCE(IDR_MENU1);
    wc.lpfnWndProc   = WndProc;
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);

    RegisterClass(&wc);
    hwnd = CreateWindow( wc.lpszClassName, TEXT("File Manager"),
        WS_SYSMENU | WS_VISIBLE,
        100, 100, 320, 240, NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    while( GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int) msg.wParam;
}

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
    static HWND listbox;
    static HWND button;
    static HWND file_name;
    static HWND path;
    static HWND fformat;

    PAINTSTRUCT ps;
    HDC hd;

    switch(msg)
    {
    case WM_DESTROY:
        {
            PostQuitMessage(0);
            return 0;
        }
    case WM_CREATE:
        {
            listbox = CreateWindow(TEXT("listbox") , NULL, WS_CHILD | WS_VISIBLE | WS_BORDER | LBS_NOTIFY,
                10, 10, 293, 120, hwnd,(HMENU) 1, NULL, NULL);
            button = CreateWindow(TEXT("button") , TEXT("Создать"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | WS_BORDER,
                10, 160, 100, 25, hwnd,(HMENU) 2, NULL, NULL);
            file_name = CreateWindow(TEXT("edit") , TEXT("file.txt"), WS_CHILD | WS_VISIBLE | WS_BORDER,
                203, 160, 100, 25, hwnd,(HMENU) 3, NULL, NULL);
            path = CreateWindow(TEXT("edit") , TEXT("default"), WS_CHILD | WS_VISIBLE | WS_BORDER,
                10, 130, 293, 25, hwnd,(HMENU) 4, NULL, NULL);
            fformat = CreateWindow(TEXT("button") , TEXT("Формат"), WS_CHILD | WS_VISIBLE | BS_CHECKBOX,
                115, 160, 80, 25, hwnd,(HMENU) 5, NULL, NULL);
            break;
        }
    case WM_COMMAND:
        {
            switch(LOWORD(wParam)){
            case ID_FILE_INFO:
                {
                    MessageBox(0, L"Programm by Push", L"Info", 0);
                    break;
                }
            case LBN_SELCHANGE:
                {
                    if(HIWORD(wParam) == 1){
                        TCHAR* buff[2] = {(TCHAR*)calloc(MAX_PATH, sizeof(TCHAR)), (TCHAR*)calloc(MAX_PATH, sizeof(TCHAR))};

                        GetWindowText(path, buff[0], MAX_PATH);
                        if(!_tccmp(buff[0], L"default"))
                        {
                            GetCurrentDirectory(MAX_PATH, buff[0]);
                        }

                        SendMessage(listbox, LB_GETTEXT, SendMessage(listbox, LB_GETCURSEL, NULL, NULL), (LPARAM)buff[1]);
                        if(MessageBox(hwnd, L"Вы хотите запустить этот файл?", L"Question", MB_OKCANCEL) == IDOK)
                            ShellExecute(hwnd, L"open", buff[1], NULL, buff[0], SW_MAXIMIZE);

                        free(buff[0]);
                        free(buff[1]);
                    }
                    break;
                }
            case IDM_SEARCH:
                {
                    TCHAR buff[2048];
                    WIN32_FIND_DATA fData = {0};
                    GetWindowText(path, buff, sizeof(buff));
                    if(!_tccmp(buff, L"default"))
                    {
                        GetCurrentDirectory(sizeof(buff), buff);
                    }
                    wcscat(buff, L"\\*");

                    HANDLE hFile = FindFirstFile(buff, &fData);

                    if(hFile != INVALID_HANDLE_VALUE)
                        do {
                            if(_tccmp(fData.cFileName, L".") && _tccmp(fData.cFileName, L".."))
                                SendMessage(listbox, LB_ADDSTRING, NULL, (LPARAM)fData.cFileName);
                        }while (FindNextFile(hFile, &fData));

                    FindClose(hFile);
                    break;
                }
            case IDM_CLEAR_LIST:
                {
                    SendMessage(listbox, LB_RESETCONTENT, 0, 0);
                    break;
                }
            case 5:
                {
                    CheckDlgButton(hwnd, 5, IsDlgButtonChecked(hwnd, 5) ? BST_UNCHECKED : BST_CHECKED);
                }
            }
            if(HIWORD(wParam) == BN_CLICKED)
            {
                if(LOWORD(wParam) == 2)
                {
                    TCHAR* file = (TCHAR*)calloc(MAX_PATH, sizeof(TCHAR));
                    DWORD dd;
                    GetWindowText(file_name, file, MAX_PATH);

                    HANDLE hFile = CreateFile(file, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, 0, 0);

                    for(WORD i=0;i < SendMessage(listbox, LB_GETCOUNT, 0, 0); i++)
                    {
                        TCHAR buff[1024];
                        SendMessage(listbox, LB_GETTEXT, i, (LPARAM)buff);
                        if(IsDlgButtonChecked(hwnd, 5))
                            _ftcstok(buff, L".");
                        _tcscat(buff, L"\r\n");
                        WriteFile(hFile, buff, _tcsclen(buff)*sizeof(TCHAR), &dd, 0);
                    }

                    CloseHandle(hFile);

                    free(file);
                }
            }

            break;
        }
    }
    return DefWindowProc(hwnd, msg, wParam, lParam);
}