In short, I need to base some window behavior on the type of object a control is dropped on, after being dragged. This is all well and good as long as the target control at the destination is a column, but not if it is any other object.
Assume I have a datawindow with two columns, and a rectangle. Let's call them c_1, c_2, and r_1, respectively.
I drag c_1 and drop it on c_2:
dwo.name = c_2
dwo.type = column
This is fine, and exactly the behavior I expect.
I drag c_1 and drop it on r_1:
dwo.name = datawindow
dwo.type = datawindow
A reference to the datawindow itself is returned. This is too broad to use as a basis for building anything meaningful, at least in my case.
In testing, it seems that I can't make dragdrop return a reference to the control at the drop location unless it is a column. Is this intended, or is something going wrong in my environment? How can I work around this if I need to base window behavior on the value of dwo.type or dwo.name?
Use the function GetObjectAtPointer
It will allow you to know exactly what object the user dropped something onto.
It returns a string of the form objectname~trow that you have to parse to identify what you need.