c – 为什么Shell_NotifyIcon气球提示不起作用？

这是在XP的Shell32.dll 6.0版本(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,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,500,NULL,hInstance,NULL);
        if (hWnd)
        {
            ShowWindow(hWnd,nCmdShow);
            while (GetMessage(&msg,0))
            {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }
        }

        return 0;
    }

    LRESULT CALLBACK WndProc(HWND hWnd,LPARAM lParam)
    {
        switch (message)
        {
            case WM_DESTROY:
            {
                NOTIFYICONDATA nid;
                memset(&nid,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,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,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;
    }