Name SetCommand
Type Method
Summary Sends text to the command window
Prototype long SetCommand(BSTR Message);
Description This lets you send text to the command window. It will only act if the command window is currently empty (to avoid wiping out something you are typing).

Because of this you cannot test "setcommand" by typing it into the command window, because by definition, the command window will not be empty (it will have the "setcommand" in it). You must do it from a script, or an immediate window.
VBscript example 
World.setcommand "think Here is another command"
Jscript example 
world.SetCommand("think Here is another command");
PerlScript example 
$world->SetCommand("think Here is another command");
Returns eCommandNotEmpty : Command area was not empty
eOK: Set OK

See also ...