CTreeCtrl in MFC

I'm sorry, That puts the list in cokums. I do not want that type.

See the Article:
How to Accept Drag-and-Drop Files from Windows Explorer
http://www.experts-exchange.com/articles/Programming/System/Windows__Programming/How-to-Accept-Drag-and-Drop-Files-from-Windows-Explorer.html

...which shows that as a sort of side topic.  

To create the tree, I just right-clicked it in the Dialog Editor and selected Add Variable (m_ctrlTree)

To populate the tree shwon in the example, I used code like the attached:

	HTREEITEM hItemRoot= m_ctlTree.InsertItem("All Tasks");
	HTREEITEM hItemTBD=  m_ctlTree.InsertItem("To Be Done", hItemRoot);
	HTREEITEM hItemDone=  m_ctlTree.InsertItem("Done", hItemRoot);
	m_ctlTree.InsertItem("Urgent!",        hItemTBD );
	m_ctlTree.InsertItem("Low Priority",    hItemTBD );
	m_ctlTree.InsertItem("Medium Priority", hItemTBD );
	m_ctlTree.InsertItem("Recently",        hItemDone );
	m_ctlTree.InsertItem("Last Year",       hItemDone );
                                              

1:
2:
3:
4:
5:
6:
7:
8:

As for your bools... most of them should be set in the Dialog Editor.    Right-click the tree and choose Properties.  Turn on and off things like Lines at Root and watch the "example tree" change until you have what you want.

     HTREEITEM hItemRoot= m_ctlTree.InsertItem("All Tasks");
      HTREEITEM hItemTBD=  m_ctlTree.InsertItem("To Be Done", hItemRoot);
      HTREEITEM hItemDone=  m_ctlTree.InsertItem("Done", hItemRoot);
In your example, is "hItemTBD" a subItem of " hItemRoot"?,   is "hItemDone" a subitem of  "hItemTBD" or      " hItemRoot"?  What would I use to insert a Report name under "hItemDone" let's say the report name is "Construction Report" how would I insert that report name under "hItemDone" ?

Also, is the code for finding out what was selected the same as the Combobox or List Control?
Example:

  CString m_csCategory = "";
  int m_nDropListIndex = 0;
      POSITION p = m_cCat_Tree.GetFirstSelectedItemPosition();
      //m_nDropListIndex = m_cCat_Tree.GetNextSelectedItem(p);
      m_nDropListIndex = m_cCat_Tree.GetCurSel();
      if( m_nDropListIndex < 0 )
    {
    return;
    }
      m_cCat_Tree.GetLBText( m_nDropListIndex, m_csCategory );
      

Did yo look a the Article?  There is an image that shows the hierarchy.

>> ... a Report name under "hItemDone" let's say the report name is "Construction Report" how would I insert that report name under "hItemDone" ?

Exactly as shown, only use your own text:

   m_ctlTree.InsertItem( "Construction Report", hItemDone );

>> finding out what was selected

Use the GetSelectedItem function:
   CTreeCtrl::GetSelectedItem
    http://msdn.microsoft.com/en-us/library/xw6h5d91(VS.80).aspx  

================
I think it will help you a lot to take a few minutes to read the MFC documentation about tree controls.   I sort of assumed that you had already done that.

   Using CTreeCtrl
    http://msdn.microsoft.com/en-us/library/8ws6dh1y(VS.80).aspx

    CTreeCtrl Members
    http://msdn.microsoft.com/en-us/library/7w95665f(VS.80).aspx  

I looked at the MSDN stuff and got more confused as I read mon. That's why I choose to ask Experts Exchange!   I saw the CTreeCtrl::GetSelectedItem function but didn't understand it.  If I have several layers( see below) then I don't know what I am receiving in CTreeCtrl::GetSelectedItem (at what level?)
Reports (main Heading
   Construction (Heading)
      Materials
          Cost
             Construction Exspenses.txt   // actual report
  Maintenance (Heading)
    vheicle repairs
       TruckRepairs.txt// actual report
        Parts Cost
           Vehicle Exspenses Report.txt

Now, please use the example you presented and show me How I would detect which ".txt" report was clicked on, PLEASE!

Thanks Dan, as always your explainations are easy to follow.

Dan,
This code:
  HTREEITEM hItem= m_ctrlTree.GetSelectedItem();
    CString sSelText= m_ctrlTree.GetItemText( hItem );
    MessageBox( sSelText ); // display the text of the selected tree node

works okay except any selection you select (including the Tree "Buttons" and the Headings) are returned How do I get only the subitems (the actual reports) instead of the Headings and buttons?

Dis I use the wrong command? I used NM_CLICK the wizzard provided the following empty function:
OnNMClickCkbktree(NMHDR *pNMHDR, LRESULT *pResult)

Thanks fo the points and the grade.

I don't know of any "headings" in a tree control.  However, if you want to take action when the selection changes -- whether the user clicked the mouse or used arrow keys, etc -- then best event to handle is TVN_SELCHANGED

The code you sent me gives what ever is selected(which it should), but what I need is when the select the REPORT not the heading it is under.  Could you show me how to do that!(code please)

Is there a way to track and discard all selections that are not the Reports?  I could use a switch statement to see if the return is a heading or a Report; that seems messy though; I was hoping that it could return the reports only.  It's riduclous for it to return a Button when it's clicked.

Usually,  part of a tree is structure (branches) and the key info is in the "leaves"

The normal way to tell one from the other is this:  When you populate the tree, you assign a special value into the "item data" (SetItemData).  Then whenever you need to know about the clicked or otherwise selected iem, you check the item data (GetItemData) to see if you need to take action.

As to the rest... it is your program that populates the tree, right?  So when you insert a new node, you know the full path and directory of the report, even though you only display the filename.  You just need to programmatically "remember" whatever you will need to know later.  This is usually done with an in-memory array, a database recordset, or any of a number of other standard programming techniques.

My Code:
strItems[0]= _T("Reports");
strItems[1]= _T("Construction");
strItems[2]= _T("Materials");

      HTREEITEM hReportsItemRoot= m_cTree.InsertItem(strItems[0]);
      HTREEITEM hConstItemRoot= m_cTree.InsertItem(strItems[1], hReportsItemRoot);
      HTREEITEM hMaterialsItemRoot= m_cTree.InsertItem(strItems[2],hConstItemRoot);

There's more, but you can see my strategy above.  At what point do I use this "When you populate the tree, you assign a special value into the "item data" (SetItemData). ":
(I thought SetItemData was used to populate the control itself.)
Please be patient with me and show me how to do this, also do I use a series of If ... else if .. else statement to compare the return in NM+Click or SelChanged ? an example would be nice