一、菜单资源的使用
1.菜单的分类
- 窗口的顶层菜单
- 弹出式菜单
- 系统菜单
HMENU类型表示菜单，ID表示菜单项
2、菜单资源的使用
(1).注册窗口类时设置菜单
(2).创建窗口传参设置菜单
(3).在主窗口WM_CREATE消息中利用SetMenu函数设置菜单
加载菜单资源
HMENU LoadMenu( HINSTANCE hInstance, LPCTSTR lpMenuName );
示例代码：
#include <Windows.h>
#include <stdio.h>
#include "resource.h"
HINSTANCE g_hIns = NULL;
//窗口处理函数(自定义，处理消息)
LRESULT CALLBACK WindProc(HWND hWnd, UINT msgID, WPARAM wParam, LPARAM lParam) {
switch (msgID) {
case WM_CREATE: {
HMENU hMenu = LoadMenu(g_hIns, (LPCWSTR)IDR_MENU1);
SetMenu(hWnd, hMenu);
break;
}
default:
break;
}
return DefWindowProc(hWnd, msgID, wParam, lParam);
}
//入口函数
int CALLBACK WinMain(HINSTANCE hIns, HINSTANCE hPreIns, LPSTR lpCmdLine, int nCmdShow) {
g_hIns = hIns;
//设计窗口类
WNDCLASS wc = { 0 };
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wc.hCursor = NULL;
wc.hIcon = NULL;
wc.hInstance = hIns;
wc.lpfnWndProc = WindProc;
wc.lpszClassName = TEXT("Main");
//1.注册窗口类时设置菜单
//wc.lpszMenuName = (LPCWSTR)IDR_MENU1;
wc.lpszMenuName = NULL;
wc.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
//2.创建窗口传参设置菜单
//HMENU hMenu = LoadMenu(hIns, (LPCWSTR)IDR_MENU1);
//注册窗口类
RegisterClass(&wc);//将以上所有赋值全部写入操作系统
//在内存中创建窗口
//HWND hWnd = CreateWindowEx(0, wc.lpszClassName, TEXT("Window"), WS_OVERLAPPEDWINDOW, 100, 100, 500, 500, NULL, hMenu, hIns, NULL);
HWND hWnd = CreateWindowEx(0, wc.lpszClassName, TEXT("Window"), WS_OVERLAPPEDWINDOW, 100, 100, 500, 500, NULL, NULL, hIns, NULL);
//显示窗口
ShowWindow(hWnd, SW_SHOW);
UpdateWindow(hWnd);
//消息循环
MSG nMsg = { 0 };
while (true) {
if ((PeekMessage(&nMsg, NULL, 0, 0, PM_NOREMOVE))) {
//有消息
if (GetMessage(&nMsg, NULL, 0, 0)) {
TranslateMessage(&nMsg);
DispatchMessage(&nMsg);
}
else {
break;
}
}
}
return 0;
}
3、菜单命令消息处理
菜单消息：WM_COMMAND
附带参数信息：
wPARAM：HIWORD：对于菜单为0，LOWORD：菜单项的ID
lPARAM：对于菜单为0
示例代码：
void onCommand(HWND hWnd, WPARAM wParam) {
switch (LOWORD(wParam)) {
case ID_NEW:
MessageBox(hWnd, TEXT("新建被点击"), TEXT("提示"), MB_OK);
break;
case ID_EXIT:
MessageBox(hWnd, TEXT("退出被点击"), TEXT("提示"), MB_OK);
break;
case ID_ABOUT:
MessageBox(hWnd, TEXT("关于被点击"), TEXT("提示"), MB_OK);
break;
default:
break;
}
}
//窗口处理函数(自定义，处理消息)
LRESULT CALLBACK WindProc(HWND hWnd, UINT msgID, WPARAM wParam, LPARAM lParam) {
switch (msgID) {
case WM_CREATE: {
HMENU hMenu = LoadMenu(g_hIns, (LPCWSTR)IDR_MENU1);
SetMenu(hWnd, hMenu);
break;
}
case WM_COMMAND: {
onCommand(hWnd, wParam);
break;
}
default:
break;
}
return DefWindowProc(hWnd, msgID, wParam, lParam);
}