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Mouse over the icon at the bottom of the screen
Widget with text prompts can be displayed
What class or interface to use, Show this widget.use qt or mfc

What I have tried:

No related class was found for how to display the prompt message
Updated 27-Oct-20 23:09pm
OriginalGriff 27-Oct-20 4:15am    
This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with. You are going to have to give us a lot more detail than that before we can even start to answer!

Use the "Improve question" widget to edit your question and provide better information.
ZhuTaiYong 28-Oct-20 4:46am    
thank you very much ,i think that using DwmSetIconicLivePreviewBitmap that is a good idea . windows taskbar ,like Google browser software, you move mouse to software icon, you can see Text Tips.
Shao Voon Wong 27-Oct-20 5:14am    
Do you mean tooltip?
ZhuTaiYong 28-Oct-20 4:37am    
不是,鼠标移到任务栏上的程序图标时,应该在程序缩略图上方有文字提示,比如 Google 浏览器

Your question isnt clear enough, but I guess thate you can use DwmSetIconicLivePreviewBitmap or some Tooltip.
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ZhuTaiYong 28-Oct-20 4:48am    
thanks you are a very good man
Ah! That makes more sense!
The "bottom of the screen" is called the "Taskbar", and you can "enhance" you app on it with the NotifyIcon: NotifyIcon Class (System.Windows.Forms) | Microsoft Docs[^]
Drag one from your toolbox onto your form, and give it an appropriate name: "appIcon" in my case. You can then set it's properties dynamically in your app:
/// <summary>
/// Restore size and location (if the user doesn't
/// override it)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FrmMain_Load(object sender, EventArgs e)
    if ((ModifierKeys & Keys.Shift) == 0)
    appIcon.BalloonTipIcon = ToolTipIcon.Info;
    appIcon.BalloonTipText = "Waiting for URL";
    appIcon.BalloonTipTitle = "Load image from URL";
    appIcon.Text = "Waiting for image URL ...";
    // appIcon.ShowBalloonTip(2000);            // Call this to display a "bottom left" notification.
Have a play with it, you'll get the idea!
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ZhuTaiYong 29-Oct-20 3:04am    
thank you very mush
OriginalGriff 29-Oct-20 3:20am    
You're welcome!

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