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DragDrop files into a ListBox

Posted on 2003-11-04
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653 Views
Last Modified: 2007-12-19
I have created a simple Dialog Application with a ListBox

m_dwgList.DragAcceptFiles(TRUE);
allows the drag/drop cursor to work correctly
but now how do I capture the droped file name.

The onyl examples I have found drop into a SID window not a ListBox
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Question by:MCofer
  • 3
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6 Comments
 
LVL 4

Expert Comment

by:YuriPutivsky
ID: 9680969
Use COleDropTarget class
to register your target window and catch OnDrop event like:

class YourClass;
class YourDropTarget : public  COleDropTarget
{
protected:
    virtual BOOL OnDrop(CWnd* pWnd, ...................) { return ((YourClass*)pWnd)->OnDropProcess(.....); }
}

class YourClass : public CWnd
{
friend class YourDropTarget;
private:
    BOOL OnDropProcess(....);
};

Register target OnCreate event and Revoke OnDestroy events

int YourClass::OnCreate(...)
{
    _target.Register(this);
}

void YourClass::OnDestroy(...)
{
    _target.Revoke(this);
}
0
 

Author Comment

by:MCofer
ID: 9681083
I'll give it a try
I am basicly a C programmer and may need a little more detailed help.
I'll let you know how it works.

question:
 Will this also work for a Cut & Paste event?
Thanks
0
 
LVL 4

Expert Comment

by:YuriPutivsky
ID: 9681143
For Cut/Paste you have to use another approach...
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LVL 4

Accepted Solution

by:
YuriPutivsky earned 250 total points
ID: 9681331
I forgot to add YourDropTarget class member
class YourClass : public CWnd
{
friend class YourDropTarget;
private:
    BOOL OnDropProcess(....);
   YourDropTarget _target;
};

0
 

Author Comment

by:MCofer
ID: 9681763
I had already been trying something  simular
but get the error
error C2504: 'COleDropTarget' : base class undefined
trying to create the class.
did I need to include automation when I created the project?
Can i now just add an Include file or how do I implement COle
0
 

Author Comment

by:MCofer
ID: 9682281
#include <afxole.h>

Fixed my initial problem
I'm working now on creating the class
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