关于WinAPI：C ++ Win32动态菜单-选择了哪个菜单项

c++ win32 dynamic menu - which menu item was selected

我有一个Win32应用程序(c ++)，该应用程序的上下文菜单绑定到右键单击通知图标。菜单/子菜单项在运行时动态创建和更改。

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InsertMenu(hSettings, 0, MF_BYPOSITION | MF_POPUP | MF_STRING, (UINT_PTR) hDevices, L"Setting 1");
InsertMenu(hSettings, 1, MF_BYPOSITION | MF_POPUP | MF_STRING, (UINT_PTR) hChannels, L"Setting 2");

InsertMenu(hMainMenu, 0, MF_BYPOSITION | MF_POPUP | MF_STRING, (UINT_PTR) hSettings, L"Settings");
InsertMenu(hMainMenu, 1, MF_BYPOSITION | MF_STRING, IDM_EXIT, L"Exit");

在上面的代码中，hDevices和hChannels是动态生成的子菜单。
动态菜单是这样生成的：

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InsertMenu(hDevices, i, style, IDM_DEVICE, L"Test 1");
InsertMenu(hDevices, i, style, IDM_DEVICE, L"Test 2");
InsertMenu(hDevices, i, style, IDM_DEVICE, L"Test 3");

有什么方法可以知道单击了哪个项目，而不必定义每个子菜单项自己的ID(上面的代码中的IDM_DEVICE)？ In希望检测到用户单击了子菜单IDM_DEVICE，并且单击了该子菜单中的第一项(测试1)。

我想达到这样的目标：

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case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_DEVICE: // user clicked on Test 1 or Test 2 or Test 3
UINT index = getClickedMenuItem(); // get the index number of the clicked item (if you clicked on Test 1 it would be 0,..)
// change the style of the menu item with that index
break;
}

请尝试以下操作：

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MENUINFO mi;
memset(&mi, 0, sizeof(mi));
mi.cbSize = sizeof(mi);
mi.fMask = MIM_STYLE;
mi.dwStyle = MNS_NOTIFYBYPOS;
SetMenuInfo(hDevices, &mi);

现在，您将获得WM_MENUCOMMAND而不是WM_COMMAND。菜单索引将位于wParam中，菜单句柄将位于lParam中。请注意，仅收看已知菜单的消息，然后将其余消息传递到DefWindowProc。该代码将类似于以下内容：

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case WM_MENUCOMMAND:
HMENU menu = (HMENU)lParam;
int idx = wParam;
if (menu == hDevices)
{
//Do useful things with device #idx
}
else
break; //Ensure that after that there is a DefWindowProc call