Using API ToolTip.Show(...), ToolTip will display incorrect location

[MauNguyenVan]

.NET version

net9.0-windows,

Did it work in .NET Framework?

Not tested/verified

Did it work in any of the earlier releases of .NET Core or .NET 5+?

Yes, I have test in .net 8.0, the isssue is the same

Issue description

In control Tooltip, if I use API toolTip1.SetToolTip(control, "string") => this will show OK
But I use toolTip1.Show("string",control, ...) API => the tooltip display incorrect location, it is not the same as using toolTip1.SetToolTip() API

Steps to reproduce

see my repo WinFormsToolTipBug

   #region Bug 1  toolTip1.Show() will display the tooltip is incorrect position, it is not the same as toolTip1.SetToolTip (for both toolTip1.IsBalloon = false/true)
   /// <summary>
   /// 
   /// </summary>
   /// <param name="sender"></param>
   /// <param name="e"></param>
   private void CheckBox1_CheckedChanged(object? sender, EventArgs e)
   {
       toolTip1.IsBalloon = this.checkBox1.Checked;
       
       toolTip1.Show("toolTip1.Show(text, window) => bug position", this.checkBox1);
   }

[Olina-Zhang]

Tested .NET framework 4.8.1 and .NET versions with the same results.

These 2 methods: toolTip1.Show() and toolTip1.SetToolTip() with some difference:
SetToolTip(): Automatically positions the tooltip correctly based on control boundaries, DPI scaling, and balloon settings; The OS handles the placement intelligently.
Show(): When using toolTip1.Show(text, control), the tooltip appears at the top-left corner of the control, plus some default system offset; This offset does not always account for DPI or balloon mode, resulting in misaligned or awkwardly placed tooltips.

To make Show() behave like SetToolTip(), manually specify the tooltip offset using a different overload:

// Show tooltip just below the CheckBox, similar to SetToolTip behavior
toolTip1.Show(
    "Corrected position",
    this.checkBox1,
    0,
    this.checkBox1.Height // show just below the control
);

So if your goal is just to show tips when the user hovers over controls, stick with SetToolTip(). Only use Show() if you need: Immediate programmatic display (e.g., on validation errors), Custom timing, Or specific screen locations.

[MauNguyenVan]

Yes, we can set exactly a location to show the tooltip,
but the default behavior of toolTip1.Show(text, control) is quite unreasonable (it is not like toolTip1.SetToolTip(), and the cursor covers a part of the tooltip content).
I think we can set the toolTip1.Show(text, control) display the same as toolTip1.SetToolTip() it help tooltip display more consitency

[merriemcgaw]

Given that this is not a regression from Framework, and can be handled in the application I am going to close this issue. If there are more customers calling for this change from Framework, then we could reconsider, but for now it does not meet the bar.