>About the Ctrl+S issue.
>I think it is better to call a UDF instead of calling to the form directly.
>If no form is active you will get a error using this.
>For example
>

On Key Label Ctrl+S Do SaveMyForm
>
>Function SaveMyForm()
>If 'check for if the form is a good form'
>  _Screen.ActiveForm.Save()
>EndIf
>EndFunc

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About the last thing,
For the check if the form is really a form you can use this:

TYPE("_screen.activeform") == "O" and;
  UPPER(_screen.activeform.BaseClass) = "FORM"

Then you can have another condition to check if the form is a form with a save capability.