4Windows_System_menu

// 4Windows_System_menu.cpp : 定义应用程序的入口点。
//
#include "stdafx.h"
#include "4Windows_System_menu.h"
#include <iostream>
#define PrintLog(x) WriteConsole(g_hStdout, x, strlen(x), NULL, NULL)
HINSTANCE g_hInst = NULL; //窗口句柄
HANDLE g_hStdout = NULL; //控制台句柄
CHAR szText[256] = { 0 };
void OnCreate(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
    HMENU hSysMenu = GetSystemMenu(hWnd, FALSE);
    
    //删除菜单项
    RemoveMenu(hSysMenu, 0, MF_BYPOSITION); //挨个删除
    //RemoveMenu(hSysMenu, 0, MF_BYPOSITION); //这个执行就会移动不了了
    //RemoveMenu(hSysMenu, 0, MF_BYPOSITION);
    //RemoveMenu(hSysMenu, 0, MF_BYPOSITION);
    //RemoveMenu(hSysMenu, 0, MF_BYPOSITION);
    //增加菜单项
    InsertMenu(hSysMenu, 0, MF_BYPOSITION | MF_STRING, 1001, "测试1");
    InsertMenu(hSysMenu, 0, MF_BYPOSITION | MF_STRING, 1002, "测试2");
}
//OnSysCommand
void OnSysCommand(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
    //LOWORD(wParam) 同样为系统菜单的ID
    switch (LOWORD(wParam))
    {
    case 1001:
        PrintLog("测试1被触发\n");
        break;
    case 1002:
        PrintLog("测试2被触发\n");
        break;
    }
    sprintf_s(szText, 256, "OnSysCommand wParam:%08X, lParam:%08X\n", wParam, lParam);
    PrintLog(szText);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
    switch (nMsg)
    {
    case WM_CREATE:
        OnCreate(hWnd, nMsg, wParam, lParam);
        break;
    case WM_SYSCOMMAND:
        OnSysCommand(hWnd, nMsg, wParam, lParam);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return DefWindowProc(hWnd, nMsg, wParam, lParam);
}
BOOL RegisterWnd(LPSTR pszClassName)
{
    WNDCLASSEX wce = { 0 };
    wce.cbSize = sizeof(wce);
    wce.cbClsExtra = 0;
    wce.cbWndExtra = 0;
    wce.hbrBackground = HBRUSH(COLOR_BTNFACE + 1);
    wce.hCursor = NULL;
    wce.hIcon = NULL;
    wce.hIconSm = NULL;
    wce.hInstance = g_hInst;
    wce.lpfnWndProc = WndProc;
    wce.lpszClassName = pszClassName;
    wce.lpszMenuName = NULL;
    wce.style = CS_HREDRAW | CS_VREDRAW;
    ATOM atom = RegisterClassEx(&wce);
    if (atom == NULL)
    {
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}
HWND CreateWnd(LPSTR pszClassName)
{
    HWND hWnd = CreateWindowEx(0, pszClassName, "灭天", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
        CW_USEDEFAULT, NULL, NULL, g_hInst, 0);
    return hWnd;
}
void ShowWnd(HWND hWnd)
{
    ShowWindow(hWnd, SW_SHOW);
    UpdateWindow(hWnd);
}
void Msg()
{
    MSG msg = { 0 };
    while (GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
}
void ConsoleWnd()
{
    AllocConsole();
    g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
    CHAR szText[] = "Debug start:\n";
    WriteConsole(g_hStdout, szText, strlen(szText), NULL, NULL);
}
int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
    g_hInst = hInstance;
    ConsoleWnd();
    RegisterWnd("oooo");
    HWND hWnd = CreateWnd("oooo");
    ShowWnd(hWnd);
    Msg();
    return 0;
}