Using Create with a tree control, having problems

[Ixiterra]

I'm sure I'm missing something, but I am learning VC++ on my own here. It seems like every time I try something new, I spend 10 hours tracking down something stupid. Basically this is a button that opens up a property tree control, or dialog, I don't know. Using this here: http://www.codeproject.com/treectrl/proptree.asp

BOOL CSPec::OnInitDialog()
{
	CDialog::OnInitDialog();

	DWORD dwStyle;
	CRect rc;

	// PTS_NOTIFY - CPropTree will send notification messages to the parent window
	dwStyle = WS_CHILD|WS_VISIBLE|PTS_NOTIFY;

	// Init the control's size to cover the entire client area
	GetClientRect(rc);

	// Create CPropTree control
	Tree.Create(dwStyle, rc, this, IDC_PROPERTYTREE); //Here is the problem

	//
	// Create some tree items
	//

	// Create a root item (root items should always be CPropTreeItem object since they
	// can not have properties
	CPropTreeItem* pRoot;

	pRoot = Tree.InsertItem(new CPropTreeItem());
	pRoot->SetLabelText(_T("Properties"));
	pRoot->SetInfoText(_T("This is a root level item"));
	pRoot->Expand(); // have this item expanded by default

	// Create a static item
	CPropTreeItem* pItem;

	pItem = Tree.InsertItem(new CPropTreeItem(), pRoot);
	pItem->SetLabelText(_T("Sub Item"));
	pItem->SetInfoText(_T("This is a simple subitem"));
	
	// Create a dropdown combolist box
	CPropTreeItemCombo* pCombo;

	pCombo = (CPropTreeItemCombo*)Tree.InsertItem(new CPropTreeItemCombo(), pRoot);
	pCombo->SetLabelText(_T("Combo Item"));
	pCombo->SetInfoText(_T("This is a TRUE/FALSE dropdown combo list"));
	pCombo->CreateComboBoxBool();	// create the ComboBox control and auto fill with TRUE/FALSE values
	pCombo->SetItemValue(TRUE);		// set the combo box to default as TRUE
	return TRUE;  // return TRUE  unless you set the focus to a control
}

BOOL CSPec::DestroyWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	Tree.DeleteAllItems();
	Tree.DestroyWindow();
	return CDialog::DestroyWindow();
}

I've tried various combinations of using PostNcDestroy, delete Tree vs. DestroyWindow, etc. And all I do is get crashes on the Create line after I close the dialog and open it again. As if it's not really deleting anything or something, and it's trying to access something that doesn't exist. I don't know. This is very frustrating though. :/ Any ideas, or obvious idiocy on my part? Should I just get over it and switch to VB?