File browser (WINAPI)

#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("Window"),
        WS_SYSMENU | WS_VISIBLE,
        100, 100, 250, 250, 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 button_del;
    static HWND edit;

    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, 210, 120, hwnd,(HMENU) 1, NULL, NULL);
            button = CreateWindow(TEXT("button") , TEXT("Find"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
                120, 140, 100, 25, hwnd,(HMENU) 2, NULL, NULL);
            button_del = CreateWindow(TEXT("button") , TEXT("Clr"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
                10, 140, 100, 25, hwnd,(HMENU) 4, NULL, NULL);
            break;
        }
    case WM_COMMAND:
        {
            if(HIWORD(wParam) == BN_CLICKED)
            {
                if(LOWORD(wParam) == 2)
                {
                    TCHAR buff[2048];
                    WIN32_FIND_DATA fData = {0};
                    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);

                } else if(LOWORD(wParam) == 4)
                {
                    SendMessage(listbox, LB_RESETCONTENT, 0, 0);
                }
            }
            if(LOWORD(wParam) == ID_FILE_INFO)
            {
                MessageBox(0, L"Programm by Push", L"Thanks", 0);
            }
            if(HIWORD(wParam) == LBN_SELCHANGE)
            {
                if(LOWORD(wParam) == 1)
                {
                    TCHAR* buff = new TCHAR[1024];
                    SendMessage(listbox, LB_GETTEXT, SendMessage(listbox, LB_GETCURSEL, NULL, NULL), (LPARAM)buff);
                    MessageBox(NULL, buff, NULL, NULL);
                }
            }
            break;
        }
    }
    return DefWindowProc(hwnd, msg, wParam, lParam);
}