mfc, SHBrowseForFolder

by **Murrgon** » Wed, 26 Jan 2005 06:28:43 GMT

I want to set the pidlRoot member of the BROWSEINFO structure to
a default location. How do I get a PIDL from a path represented
by a text string like this: _T("C:\Program Files")?

Thanks

by **Michael K. O'Neill** » Wed, 26 Jan 2005 07:09:05 GMT

I'm not certain about the pidl for an arbitrarily named folder, but if your
real interest is the "Program Files" folder, then you shouldn't use a text
string anyway, since the text is user-selectable and in fact changes based
on language locales.

For "Program Files" and other special folders, you can get the pidl using
the SHGetFolderLocation function, passing in a CSIDL of CSIDL_PROGRAM_FILES.
See
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/reference/functions/shgetfolderlocation.asp

Mike

by **Murrgon** » Thu, 27 Jan 2005 00:17:38 GMT

Well, actually I am not all that interested in the "Program Files" folder.
I was just using it as an example. Maybe a better example would be, how do
I get the PIDL of _T("F:\WorkingFiles\Resources")?

by **Murrgon** » Thu, 27 Jan 2005 00:28:44 GMT

Well, I did some digging and I found this at code project:

http://www.codeproject.com/file/browsepf.asp

This is what I was looking for.
Thanks

by **Jeff F** » Thu, 27 Jan 2005 00:41:41 GMT

This works for me.

#include "stdafx.h"

#include <string>
#include <comdef.h>

template< typename tIComPtr, HRESULT (STDAPICALLTYPE* tInitFnc)( typename
tIComPtr::Interface** ) >
class RaiiComPtr
{
tIComPtr mCom;
public:
RaiiComPtr():mCom(){ tInitFnc( &mCom ); }

tIComPtr operator->()const{ return mCom; }
tIComPtr IComPtr()const{ return mCom; }
};

class PathPidl
{
typedef RaiiComPtr<IMallocPtr,SHGetMalloc> tMallocPtr;

LPITEMIDLIST mPidl;
public:

PathPidl( const std::string& aPath )
: mPidl( NULL )
{
DWORD lFlags = SFGAO_FOLDER;

SHILCreateFromPath(
std::wstring(aPath.begin(),aPath.end()).c_str(), &mPidl, &lFlags );
}

~PathPidl(){ if( mPidl ) tMallocPtr()->Free( (void*)mPidl ); }

operator LPCITEMIDLIST()const{ return mPidl; }
};

void some browsefnc()
{
PathPidl lPathPidl = PathPidl( "c:\\somePath" );

BROWSEINFO bi;

bi.pidlRoot = lPathPidl;

...
}

Jeff F

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