How to show a .NET Balloon ToolTip?

问题:

How do i show an IsBalloon ToolTip in WinForms?

Right now i try:

ToolTip hint = new ToolTip();
hint.IsBalloon = true;
hint.ToolTipCaption = "Hello, world!";
hint.ToolTipIcon = ToolTipIcon.Error;
hint.Show("Please create a world.", myTextBox, 0, 0);

Unfortunately the balloon doesn't point to (0, 0) (relative to the control), but shows up at (0,0) (relative to the control):

What is the correct way to show a .NET Balloon ToolTip?

回答1:

Known bug. Call it twice, first empty:

toolTip.Show(string.Empty, myTextBox, 0);
toolTip.Show("Please create a world.", myTextBox);

From How do I make a tooltip point at a specific label in C#?