This example displays a input window at a position of 675 from the left.
winMargins = {{675, Automatic}, {130, Automatic}};
InputString["testing WindowMargins! stop: 0",
FieldSize -> Small, WindowMargins -> winMargins];
I want to display the window centered horizontally on the screen. I tried to use the following, but it does not work.
winMargins = {{Scaled[{0.5}], Automatic}, {130, Automatic}};
How can I get a horizontally centered input window?