🚀 go-pugleaf

Thank you.

Remy Lebeau (TeamB) wrote:

>"Jonathan Starr" <starr@belsoft.com> wrote in message
>news:3f838962$1@newsgroups.borland.com...
>  
>
>>I have a Multiple Document Interface app.  I assign a handler for
>>OnDragOver for the main form.   I run the app, and drag a file
>>from the desktop to the app's main form.  The handler does not
>>get called.
>>    
>>
>
>It is not supposed to be.  The OnDrag... events are only for the VCL's own
>use when dragging VCL controls around within the application itself.  They
>are not meant for interacting with the rest of the system at all.
>
>For what you ask, you need to either:
>
>1) call DragAcceptFiles() at program startup and then intercept WM_DROPFILES
>messages, using DragQueryFile() and DragQueryPoint() to obtain information
>about each dropped file (this is the easier way to go).
>
>2)  Create your own IDropTarget-derived object and then call
>RegisterDragDrop() at program startup and RevokeDragDrop() at program
>termination.  When a drop occurs, your IDropTarget will be called into by
>the system to handle the operation (this is the way Microsoft recommends
>people to go).
>
>All of this is documented in the Win32 API documentation.
>
>
>Gambit
>
>
>  
>