为什么不Shell_NotifyIcon气球提示工作？

Question

在应用程序窗口

根据一切我所看到的，下面的C ++程序应该显示从我的托盘图标气球工具提示，单击鼠标左键，但它不工作。谁能告诉我，我错过了什么？

这是在XP与Shell32.dll中的6.0版（具有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，我计算出来。出于某种原因，与我有...

标题

的sizeof（NOTIFYICONDATA）== 508

...而

NOTIFYICONDATA_V3_SIZE == 504，点击 NOTIFYICONDATA_V2_SIZE == 488结果 NOTIFYICONDATA_V1_SIZE == 88

如果我指定任一V2或V3的代替的sizeof（NOTIFYICONDATA）气球提示显示就好了。

Answer 2

有你的注册表检查下...

HKEY_CURRENT_USER \软件\微软\的Windows \ CurrentVersion \ Explorer中\高级

...用于为EnableBalloonTips？这件事情很常见的用户关闭。

Answer 3

的问题是，我们假定你是的Windows是要送你一个WM_LBUTTONDOWN当用户点击该图标，但是这是不正确的。 WM_LBUTTONDOWN（根据你的代码）和lParam参数，当用户点击的hWnd的客户区域内只送出，如果你仔细阅读NOTIFYICONDATA的你会发现，当用户点击该图标的Windows会送你一个WM_USER+20消息的文档你会得到WM_LBUTTONDOWN通知。