Well I assumed that the poster already knew that way to do it. Here's another way to do it. In all of the solutions except AutoPython's the output will contain three spaces in the middle, but the original post only has one space between the o and the w. Here is a way to do that programatically
mystring = 'Hello World'
outstring = ''
for x in mystring:
outstring += x
if x != ' ':
outstring += ' '
For Each ctrl As Control In Me.Controls("pnlMainPanel").Controls
If ctrl.GetType Is GetType(System.Windows.Forms.Panel) Then
For Each subCtrl As Control In ctrl.Controls
If subCtrl.GetType Is GetType(System.Windows.Forms.TextBox) Then
If subCtrl.GetType Is ...