>>>>I've added the _mouseover class to a form; the form runs in a top-level form. The form works fine when running along, but when I run it as part of the app, or exe, it behaves oddly.
>>>>
>>>>If I mouse over the navigation controls that use the effects, and then use the "X" to close the form, the X suddenly disables (and the CLOSE is gone from the Windows menu). If I place the mouse back over one of the other controls I get:
>>>>
>>>>Data type mismatch
>>>>highlightme
>>>>Line 34
>>>>
>>>>Line 34 is:
>>>>
>>>>WITH This.oHost
>>>>
>>>>then a string of successive error messages appears, each relating to the various expressions inside the WITH.
>>>>
>>>>After adding the mouseover effects class I added cancelhighlight to the control container and the form (something that is not used in TASTRADE). And I also added this code to prevent disabled controls from being highlighted:
>>>>
>>>>*MouseMove of each button
>>>>if thisform._datanavbtns1.cmdtop.enabled=.t.
>>>>THISFORM._mouseOverFX1.HighlightMe(this)
>>>>endif
>>>>
>>>>Any ideas how I can resolve this?
>>>
>>>
>>>Sounds like you have a hanging object reference some where in your code. Be sure to NULL out any stored object references you may have in your form destroy event.
>>
>>For fear of sounding REALLY stupid, how do I do this?
>>
>>TIA,
>
>For example: Say you've created an object reference property on your form to some control on the form.
>
>MyForm.MyObjectRef = MyForm.TextBox1
>
>When you do your form Destroy Method, you should put a this.MyObjectRef = .NULL. there, otherwise you'll have a "dangling object reference" that will prevent your form from closing properly.
>
>Does this help?


Well, my first thought was of an OLD English teacher and her constant chiding about "Dangling Participles".....but that's for another thres <g>

I'm real new to this. I don't think I have such a reference property, but I don't know.

In the Click event of the option buttons, I have:

SET ORDER TO TAG custno
GO TOP
THISFORM.combo2.COLUMNWIDTHS="62,190"
THISFORM.combo2.ROWSOURCE="Customer_Ship_To.custno,custname"
THISFORM.combo2.REQUERY()
thisform.combo2.listindex=1
THISFORM.REFRESH()
THISFORM.combo2.SETFOCUS()

In the click events of the cmdbtns I have:

DODEFAULT()
IF TAG()='CUSTNO'
THISFORM.combo2.VALUE=Customer_Ship_To.CUSTNO
ENDIF
IF TAG()='CUSTNAME'
THISFORM.combo2.VALUE=Customer_Ship_To.CUSTNAME
ENDIF
THISFORM.combo2.REFRESH()

and in the MouseMove event of the cmdbtns I have:

LPARAMETERS nButton, nShift, nXCoord, nYCoord
if thisform._datanavbtns1.cmdtop.enabled=.t.
THISFORM._mouseOverFX1.HighlightMe(this)
endif

Perhaps you can help me determine if I have dangled a reference :)

TIA