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The Mini Shell Extension Framework – Part III

, 18 Sep 2005
Discussion of a small C++ framework to create Windows shell extensions (IShellFolderImpl).
include
columnprovider.rgs
contextmenu.rgs
contextmenu_sf.rgs
extension.rgs
extractimage_sf.rgs
infotip.rgs
infotip_sf.rgs
propertysheetext.rgs
propertysheetext_sf.rgs
shell32missing.def
shell32missing.lib
shellfolder.rgs
shellfolderwin98.rgs
vvvsample
Copy of sample1.vvv
menuicon.bmp
sample.def
sample.manifest
sample1.vvv
vvv.ico
vvvtest
sample.yyy
sample1.vvv
sample2.vvv
//
// (C) Copyright by Victor Derks <vba64@xs4all.nl>
//
// See README.TXT for the details of the software licence.
//
#pragma once


namespace MSF
{


// Purpose: Simple class to create a propertysheet.
//          For more advanced functionality use WTL OR MFC.
//          There is extra support to return a mask that can be used
//          to reflect if the user made any actual changes.
//
class CPropertySheet
{
public:
	class CPropSheetHeader : public PROPSHEETHEADER
	{
	public:
		CPropSheetHeader(const CString& strCaption, DWORD dwflags = 0)
		{
			ZeroMemory(static_cast<PROPSHEETHEADER*>(this), sizeof(PROPSHEETHEADER));
			dwSize = PROPSHEETHEADER_V1_SIZE;
			dwFlags = dwflags;

			m_strCaption = strCaption;
			pszCaption = m_strCaption.GetString();
		}


		void SetPages(std::vector<HPROPSHEETPAGE>& hpages)
		{
			phpage = &hpages[0];
			nPages = static_cast<UINT>(hpages.size());
		}

	private:
		CString	m_strCaption;
	};


	CPropertySheet(const CString& strCaption, DWORD dwFlags = 0)
		: _propsheetheader(strCaption, dwFlags), _wEventId(0)
	{
	}


	CPropertySheet(UINT nIDCaption, DWORD dwFlags = 0)
		: _propsheetheader(LoadString(nIDCaption), dwFlags), _wEventId(0)
	{
	}


	~CPropertySheet()
	{
		// Clean up pages that are added but never used.
		for (std::vector<HPROPSHEETPAGE>::iterator it = _hpages.begin(); it != _hpages.end(); ++it)
		{
			ATLVERIFY(DestroyPropertySheetPage(*it));
		}
	}


	void AddPage(HPROPSHEETPAGE hpage)
	{
		_hpages.push_back(hpage);
	}


	int DoModal(HWND hwndParent)
	{
		_propsheetheader.hwndParent = hwndParent;
		_propsheetheader.SetPages(_hpages);

		int result = static_cast<int>(PropertySheet(&_propsheetheader));
		_hpages.clear();
		return result;
	}


	long DoModalReturnChanges(HWND hwndParent)
	{
		_wEventId = 0;
		int result = DoModal(hwndParent);
		if (result <= 0)
			return 0;

		return _wEventId;
	}

	long& GetEventId()
	{
		return _wEventId;
	}

private:

	CPropertySheet(const CPropertySheet&);            // not implemented by design
	CPropertySheet& operator=(const CPropertySheet&); // not implemented by design

	// Member variables.
	CPropSheetHeader            _propsheetheader;
	std::vector<HPROPSHEETPAGE> _hpages;
	long                        _wEventId;
};

} // end MSF namespace.

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About the Author

Victor Derks
Software Developer (Senior) Schneider Electric
Netherlands Netherlands
Victor lives in Nijmegen, the oldest city in The Netherlands.
He studied Applied Physics in Delft and now works for GE Healthcare.

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