To reproduce:

1. Create a RadForm - Form1
2. Change its BackColor at design time
3. Create another RadForm - Form2 
4. Open it at design time. It is expected to have the BackColor coming from the parent form.

Workaround: Set the color in the form's constructor instead of at design time.

How to reproduce: check video and attached project

Workaround: instead of setting the AutoScroll to true of the child form use a RadScrollablePanel

Steps to reproduce:
1. Add a RadPropertyGrid to a form and subscribe for the PropertyValidating event
2. In the event handler show a RadMessageBox

Run the project and change a property. Try to save the value and you will see an exception.

Please refer to the attached sample project.

Workaround:
this.SizeChanged += RadForm1_SizeChanged;
private void RadForm1_SizeChanged(object sender, EventArgs e)
{
    if (this.WindowState == FormWindowState.Maximized  && !this.IsMdiChild)
    {
        this.Region = null;
    }
}

1. 2 Monitors configured. The primary display is 16:9 (laptop), the second display has an aspect ratio is 16:10 (desktop monitor).
2. move sample Telerik WinForm app to secondary display (desktop monitor)
3. Click on maximize button

Result: Application width is more then monitor size, as result application is truncated from right.

The same happens with "RadControls for WinForms Q1 2010 Demos" which I have installed on my PC

To reproduce:
- Add 3 MDI child forms with a lot of gauges.
- Set their WindowState to maximized.
- Show each upon a button click.

Workaround:
Set the state of all forms to normal, before adding a new maximized form.

To reproduce:
public partial class RadForm1 : MyForm
{
    public RadForm1()
    {
        InitializeComponent();
    }
}
public class MyForm : RadForm
{
    public MyForm()
    {
        this.AllowTheming = false;

    }
}

Create a new project with an anchored control in all corners. You can simply do the test, insert a scheduler or gridview, snap on all corners, set WindowsState to maximized and start the program with a DPI of even 125%, and see the problem right away. Tested with new projects both in Net Framework and .Net. I also tried creating a new instance of Winforms and setting the Windowstate from there by code, but the problem remains.

Telerik UI overflow exception with certain pointing devices, especially the LogiTech TouchPad T650. (an Int32 somewhere needs to be an Int64?)

StackTrace:

at Telerik.WinControls.UI.RadFormBehavior.OnWMNCHittest(Message& m)
at Telerik.WinControls.UI.RadFormBehavior.HandleWndProc(Message& m)
at Telerik.WinControls.UI.RadFormControlBase.WndProc(Message& m)

To reproduce: run the attached sample project and refer to the screenshot.

Workaround: 
((TextPrimitive)this.FormElement.TitleBar.CaptionElement).UseCompatibleTextRendering=true; 
or set the RadForm.AllowTheming property to false.

Setting the ShowIcon to false hides the icon. You then decide to show the icon again, and you set ShowIcon back to true. However, the icon does not appear again.

Please refer to the attached screenshot and sample project.

Workaround: call the RadForm.EndInit method before showing the form.

Opening and closing the designer force the RadForm to change its width/height with .NET 8

To reproduce:
-add a RadForm and specify its Icon property;
-modify Resources area on project's Properties -> Application tab in order to add Icon and manifest;
-run the project and you will notice that the specified icon is displayed in the taskbar. However, Alt+Tab panel does not display the certain RadForm's icon.

When you set the WindowState property to Maximized, the FormBorderStyle to None and the TopMost property to true, the RadForm does not render correctly if its size is equal to the screen size.

When setting an icon to RadForm, it should be resized automatically.

FIX. RadRibbonForm - ApplicationButtonElement and QuickAccessToolBar are cut off when Aero if off and the form is maximized

I have an issue such that when I place my application (which is based on a RadRibbonForm) on to my right hand 4K monitor and then maximise it I get a small amount of "bleed" of my application on to the right hand side of my left monitor.

On inspecting the forms desktop bounds property it see X = 1908, Y = -12, width = 3864, height = 2114. I was expecting X = 1920, Y = 0, width = 3840, height = 2090 which is what is being reported in Screen.AllScreens.

I'm using the latest version of WinForms and have done what is suggested in this link.

I can reproduce the same behaviour when I run "Demo Application - Telerik UI for WinForms R2 2022 SP1", move it to my large right hand monitor then maximise it.

Kind regards
Toby