Hi to all, I have a very strange problem using the winform ribbon.

Please, first have a look to the attached .avi video.

Onto a standard Form I’ve inserted a ribbon (without any tab, groups, application menu and so on….). Then I put only a standard windows button to show a simple message box.

Here the code underlying the click:

private void button1_Click(object sender, EventArgs e)

{

MessageBox.Show("Click", "Hello");

}

No other code, all objets have the default properties.

When I click the button the message box doesn’t appear until the mouse pointer remains inside the form. As soon it leaves the form the system show the message box. It also appears if I press the tab key. This behaviour happens systematically onto my machine and onto a few others machine inside my organization. I the others cases the same executable works fine!

But if the form is maximized it always works fine.

Any ideas about?

Could be an Infragistics problem or OS problem?

Environment:

Windows XP Professional version 2002 SP3 (All windows updates successfully installed).

Microsoft Visual Studio 2008 Team system version 9.0.30729.1 SP1.

Microsoft .NET Framework version 3.5 SP1.

UltraWinToolbars version 8.1.20081.2058.

Thanks in advance.