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#include <windows.h>const char g_szClassName[] = "myWindowClass";// Step 4: the Window ProcedureLRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){   switch(msg)   {// Handling Left Mouse Click        case WM_LBUTTONDOWN:        {            char szFileName[MAX_PATH];            HINSTANCE hInstance = GetModuleHandle(NULL);            GetModuleFileName(hInstance, szFileName, MAX_PATH);            MessageBox(hwnd, szFileName, "This program is:", MB_OK | MB_ICONINFORMATION);        }        break;// End Handling Left Mouse Click      case WM_CLOSE:         DestroyWindow(hwnd);      break;      case WM_DESTROY:         PostQuitMessage(0);      break;      default:         return DefWindowProc(hwnd, msg, wParam, lParam);   }   return 0;}int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,    LPSTR lpCmdLine, int nCmdShow){    WNDCLASSEX wc;    HWND hwnd;    MSG Msg;    //Step 1: Registering the Window Class    wc.cbSize        = sizeof(WNDCLASSEX);    wc.style         = 0;    wc.lpfnWndProc   = WndProc;    wc.cbClsExtra    = 0;    wc.cbWndExtra    = 0;    wc.hInstance     = hInstance;    wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);    wc.lpszMenuName  = NULL;    wc.lpszClassName = g_szClassName;    wc.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);    if(!RegisterClassEx(&wc))    {        MessageBox(NULL, "Window Registration Failed!", "Error!",            MB_ICONEXCLAMATION | MB_OK);        return 0;    }    // Step 2: Creating the Window    hwnd = CreateWindowEx(        WS_EX_CLIENTEDGE,        g_szClassName,        "The title of my window",        WS_OVERLAPPEDWINDOW,        CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,        NULL, NULL, hInstance, NULL);    if(hwnd == NULL)    {        MessageBox(NULL, "Window Creation Failed!", "Error!",            MB_ICONEXCLAMATION | MB_OK);        return 0;    }    ShowWindow(hwnd, nCmdShow);    UpdateWindow(hwnd);    // Step 3: The Message Loop    while(GetMessage(&Msg, NULL, 0, 0) > 0)    {        TranslateMessage(&Msg);        DispatchMessage(&Msg);    }    return Msg.wParam;}