Hi ERobishaw,
Sorry for the delayed response.
You can have toolstripbutton to stay selected while the popup is showing using following code snippet.
[C#]
private void toolStripDropDownButton1_MouseLeave(object sender, EventArgs e)
{
if (!this.toolStripDropDownButton1.Pressed)
{
this.toolStripDropDownButton1.Select();
}
}
Sample referencePlease refer the sample that illustrates the same.
http://websamples.syncfusion.com/samples/Tools.Windows/F71315_1/main.htmRegards,
Jaya