application.showFormInDialog

I am trying to set the width and height of a form in a dialog.

Normally I would do this:```
application.showFormInDialog( forms.name, -1, -1, -1, -1); //use default values

Now I am trying to get this to work:```
application.showFormInDialog( forms.name, -1, -1, -1, 600); //set only the height
```. This doesn't work. What does work is:```
application.showFormInDialog( forms.name, -1, -1, 540, 600); //set width and height
```. Is this a bug or is this expected bahavior.

expected, you can set the size or location or none, but not partial