Hi Maverick,
Thank you for your interest in Syncfusion Products.
StatusStripEx has two panes - notification pane (left) and control pane (right). ToolStripStatusLabel fills the control pane by default and hence Spring property does not have any effect on it. You can stretch the ToolStripStatusLabel to fill the StatusStrip using the below code after setting AutoSize of the label to false.
[C#]
private void Form1_SizeChanged(object sender, EventArgs e)
{
this.toolStripStatusLabel1.Width = this.statusStripEx1.Width - (statusStripEx1.SizeGripBounds.Width + 4);
}
Please refer to the below sample and let me know if this helps you.
http://websamples.syncfusion.com/samples/Tools.Windows/F76372/main.htmRegards,
Hema