I do not believe that there is such a Property, unless you create one.:)
See if this helps otherwise.
3 Panels (including Labels and TextBoxes as your attached images)
Public Class Form1
Private iWidth As Integer = 0 '// used to resize.
Private Sub Form1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Resize
iWidth = CInt((Me.ClientRectangle.Width - 20) / 3) '// change the "-20" to work as needed for your project.
Panel1.Width = iWidth : Panel2.Width = iWidth : Panel3.Width = iWidth '// resize Panels.
Panel2.Left = Panel1.Left + Panel1.Width + 5 : Panel3.Left = Panel2.Left + Panel2.Width + 5 '// set Panels New Locations.
resizeTextBoxes(Panel1) : resizeTextBoxes(Panel2) : resizeTextBoxes(Panel3) '// resize TextBoxes in Panels.
End Sub
Private Sub resizeTextBoxes(ByVal selectedPanel As Panel)
For Each ctl As Control In selectedPanel.Controls
If TypeOf ctl Is TextBox Then ctl.Width = (selectedPanel.Width - ctl.Left) - 5 '// "-5" accumulates the space of TextBox and end of Panel.
Next
End Sub
End Class