c++ - 为什么 Shell_NotifyIcon 气球提示不起作用？

Question

根据我所看到的一切，当我在应用程序窗口中左键单击时，以下 C++ 程序应该会从托盘图标显示气球工具提示，但它无法正常工作。谁能告诉我我错过了什么？

这是在 XP 上的 Shell32.dll 版本 6.0(使用 DllGetVersion 验证)。

谢谢!

    #include "stdafx.h"
    #include "shellapi.h"

    LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

    int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
    {
        MSG msg;

        WNDCLASS wc;
        memset(&wc, 0, sizeof(wc));
        wc.lpfnWndProc = WndProc;
        wc.hInstance = hInstance;
        wc.hCursor = LoadCursor(NULL, IDC_ARROW);
        wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
        wc.lpszClassName = "sysTrayTest";
        RegisterClass(&wc);

        HWND hWnd = CreateWindow("sysTrayTest", "", 
                                WS_OVERLAPPEDWINDOW,
                                CW_USEDEFAULT, 0, 500, 500, 
                                NULL, NULL, hInstance, NULL);
        if (hWnd)
        {
            ShowWindow(hWnd, nCmdShow);
            while (GetMessage(&msg, NULL, 0, 0))
            {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }
        }

        return 0;
    }

    LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
    {
        switch (message)
        {
            case WM_DESTROY:
            {
                NOTIFYICONDATA nid;
                memset(&nid, 0, sizeof(NOTIFYICONDATA));
                nid.cbSize = sizeof(NOTIFYICONDATA);
                nid.hWnd = hWnd;
                nid.uID = 1;
                Shell_NotifyIcon(NIM_DELETE, &nid);

                PostQuitMessage(0);
            }
            break;

            case WM_CREATE:
            {
                NOTIFYICONDATA nid;
                memset(&nid, 0, sizeof(NOTIFYICONDATA));
                nid.cbSize = sizeof(NOTIFYICONDATA);
                nid.hWnd = hWnd;
                nid.uID = 1;
                nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
                nid.uCallbackMessage = WM_USER + 200;
                nid.hIcon = LoadIcon(NULL, IDI_INFORMATION);
                lstrcpy (nid.szTip, "Test Tip");
                Shell_NotifyIcon(NIM_ADD, &nid);
            }
            break;

            case WM_LBUTTONDOWN:
            {
                NOTIFYICONDATA nid;
                memset(&nid, 0, sizeof(NOTIFYICONDATA));
                nid.cbSize = sizeof(NOTIFYICONDATA);
                nid.hWnd = hWnd;
                nid.uID = 1;
                nid.uFlags = NIF_INFO;
                lstrcpy(nid.szInfo, "Test balloon tip");
                lstrcpy(nid.szInfoTitle, "Test Title");
                nid.dwInfoFlags = NIIF_INFO;
                nid.uTimeout = 15000;
                Shell_NotifyIcon(NIM_MODIFY, &nid);
            }
            break;

            default:
                return DefWindowProc(hWnd, message, wParam, lParam);
        }
        return 0;
    }

Answer 1

呸，我想通了。出于某种原因，我的标题...

sizeof(NOTIFYICONDATA) == 508

鉴于...

NOTIFYICONDATA_V3_SIZE == 504
NOTIFYICONDATA_V2_SIZE == 488
NOTIFYICONDATA_V1_SIZE == 88

如果我指定 V2 或 V3 而不是 sizeof(NOTIFYICONDATA)，则气球提示显示得很好。