Menu e submenu

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

char txt[] = {"Arquivos de Recursos"};

TCHAR szAppName[] = TEXT("RECURSOS");

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wP, LPARAM lP) {
    switch(msg) {
        case WM_COMMAND:
            if(LOWORD(wP)==IDM_A1) {
                int cxScreen, cyScreen;
                cxScreen = GetSystemMetrics(0);
                cyScreen = GetSystemMetrics(1);
                char tela[20];
                wsprintf(
                    tela,
                    "Vertical: %d Horiontal: %d",
                    cxScreen,
                    cyScreen
                );
            	MessageBox(
                    NULL,
                    tela,
                    "Medidas do Monitor!",
                    MB_OK
                );
            }
            if(LOWORD(wP)==IDM_A2) {
            	MessageBox(
                    NULL,
                    "O aplicativo será fechado!",
                    "Aviso!",
                    MB_OK
                );
                exit(0);
            }
            if(LOWORD(wP)==IDM_A3) {
            	MessageBox(
                    NULL,
                    __TIME__,
                    "Hora:",
                    MB_OK
                );
            }
            return 0;
        case WM_DESTROY: {
            PostQuitMessage(0);
            break;
        }
		
        default:
            return DefWindowProc(hwnd, msg, wP, lP);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hI, HINSTANCE hPI, LPSTR szCL, int iCS) {
    WNDCLASS wc;
    HWND     hwnd;
    MSG      msg;

    wc.style       = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra  = 0;
    wc.cbWndExtra  = 0;
    wc.hInstance   = hI;
    wc.hIcon       = LoadIcon(hI, ICONE);
    wc.hCursor     = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = GetSysColorBrush(COLOR_GRAYTEXT);
    wc.lpszMenuName  = szAppName;
    wc.lpszClassName = szAppName;

    if(!RegisterClass(&wc)) {
        MessageBox(
            NULL,
            "Window Registration Failed!",
            "Error!",
            MB_ICONEXCLAMATION | MB_OK
        );
        return 0;
    }

    hwnd = CreateWindow(
        szAppName, txt, WS_VISIBLE | WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 500, 300,
        NULL, NULL, hI, NULL
    );

    ShowWindow(hwnd, iCS);
    UpdateWindow(hwnd);

    while(GetMessage(&msg, NULL, 0, 0) > 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg); /* Send it to WndProc */
    }
    return msg.wParam;
}

/* -- Arquivo: resource.h -- */


#define ICONE  17

#define IDM_A1 18
#define IDM_A2 19
#define IDM_A3 20
#define IDM_A4 21
#define IDM_A5 22
#define IDM_A6 23
#define IDM_A7 24

/* -- Arquivo: resource.rc -- */


#include "resource.h"
#include "afxres.h"

ICONE ICON "project1.ico"

RECURSOS MENU DISCARDABLE
BEGIN
    POPUP "&Detalhe"
    BEGIN
        MENUITEM "&Monitor",  IDM_A1
        MENUITEM "&Fechar",   IDM_A2
    END
    MENUITEM "&Horário",      IDM_A3
    MENUITEM "&Conexão",      IDM_A4
    MENUITEM "&Sistema",      IDM_A5
    MENUITEM "&Localização",  IDM_A6
    MENUITEM "&Memória",      IDM_A7
END