Shell_NotifyIcon 在底层使用 IUserNotification。我玩弄了它并做了一个从中得到效用 http://www.paralint.com/projects/notifu。我听说有一位视障系统管理员使用它来使他的脚本屏幕阅读器兼容。它是命令行,没有消息循环。
它具有自我意识,这意味着发送给它的通知将排队(您可以控制它)。为了实现这一点,我提供了一个 IQueryContinue 实现。该项目是用 C++ 编写的,并且是开源的,请自行帮助。
这是它的核心内容:
HRESULT NotifyUser(const NOTIFU_PARAM& params, IQueryContinue *querycontinue, IUserNotificationCallback *notifcallback)
{
HRESULT result = E_FAIL;
IUserNotification *un = 0;
IUserNotification2 *deux = 0; //French pun : "un" above stands for UserNotification but it also means 1 in French. deux means 2.
//First try with the Vista/Windows 7 interface
//(unless /xp flag is specified
if (!params.mForceXP)
result = CoCreateInstance(CLSID_UserNotification, 0, CLSCTX_ALL, IID_IUserNotification2, (void**)&deux);
//Fall back to Windows XP
if (!SUCCEEDED(result))
{
TRACE(eWARN, L"Using Windows XP interface IUserNotification\n");
result = CoCreateInstance(CLSID_UserNotification, 0, CLSCTX_ALL, IID_IUserNotification, (void**)&un);
}
else
{
TRACE(eINFO, L"Using Vista interface IUserNotification2\n");
un = (IUserNotification*)deux; //Rather ugly cast saves some code...
}
if (SUCCEEDED(result))
{
const std::basic_string<TCHAR> crlf_text(L"\\n");
const std::basic_string<TCHAR> crlf(L"\n");
std::basic_string<TCHAR> text(params.mText);
size_t look = 0;
size_t found;
//Replace \n with actual CRLF pair
while ((found = text.find(crlf_text, look)) != std::string::npos)
{
text.replace(found, crlf_text.size(), crlf);
look = found+1;
}
result = un->SetIconInfo(params.mIcon, params.mTitle.c_str());
result = un->SetBalloonInfo(params.mTitle.c_str(), text.c_str(), params.mType);
//Looks like it controls what happends when the X button is
//clicked on
result = un->SetBalloonRetry(0, 250, 0);
if (deux)
result = deux->Show(querycontinue, 250, notifcallback);
else
result = un->Show(querycontinue, 250);
un->Release();
}
return result;
}