Sol.util.IsMetaKeyDown

Sol.util.IsMetaKeyDown = function(keyName)
Check if the specified meta key is pressed
Parameters
+ keyName - one of Alt, Shift, Control, Ctrl, None, Any, or All
Returns
+ true if the specified key is pressed (for Alt, Shift, Control,
and Ctrl), if all are pressed (for All), or if None, Any, "", or 
nil is specified as the key; false otherwise