Hi Scott,

> I have form A that contains an ActiveX control (LeadTools v9, old, I know)

You could disable the control in the Deactivate event of form A and activate it in the Activate event:

Declare Long GetParent in Win32API Long
Declare Long EnableWindow in Win32API Long, Long

* Disable
EnableWindow( GetParent(oleControl.Hwnd), 0 )

* Enable
EnableWindow( GetParent(oleControl.Hwnd), 1 )

This could prevent it from responding to OLE drag and drop messages.