attach_system_image_list.shtml

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<FONT COLOR="#A0A099">Attaching System ImageList to ListControl</FONT></H3></CENTER>

<HR WIDTH="100%">This code was contributed by <A HREF="mailto:matt_esterly@vds.com">Matt
Esterly</A>.
<PRE>
<TT><FONT COLOR="#000000">A system image list contains each file, folder, shortcut, etc. 's icon.&nbsp; This can come&nbsp;
in very handy for creating a custom explore type application.&nbsp; The first step consists
of getting the small and large (if you want it) image lists from the system then attaching
them to a CImageList and then adding them&nbsp; to your list control.&nbsp; Don't forget to Detach() them after you&nbsp;
are done or else all the icons on the system will disappear and a reboot seems to be the only fix.&nbsp;

Create the following member variables in you list control class:&nbsp;
</FONT><FONT COLOR="#990000">CImageList m_smallImageList;&nbsp;
CImageList m_largeImageList;&nbsp;

</FONT><FONT COLOR="#000000">And add this function:&nbsp;
</FONT><FONT COLOR="#990000">void CSystemListCtrl::InitializeSystemImageList()&nbsp;
{&nbsp;
</FONT><FONT COLOR="#009900">&nbsp;//image list setup&nbsp;
</FONT><FONT COLOR="#990000">&nbsp;HIMAGELIST&nbsp; hSystemSmallImageList, hSystemLargeImageList;&nbsp;
&nbsp;SHFILEINFO&nbsp;&nbsp;&nbsp; ssfi, lsfi;&nbsp;

&nbsp;&nbsp;</FONT><FONT COLOR="#009900"> //get a handle to the system small icon list&nbsp;
</FONT><FONT COLOR="#990000">&nbsp;hSystemSmallImageList =&nbsp;
&nbsp; (HIMAGELIST)SHGetFileInfo(&nbsp;
&nbsp; (LPCTSTR)_T("C:\\"),&nbsp;
&nbsp; 0,&nbsp;
&nbsp; &amp;ssfi,&nbsp;
&nbsp; sizeof(SHFILEINFO),&nbsp;
&nbsp; SHGFI_SYSICONINDEX | SHGFI_SMALLICON);&nbsp;
</FONT><FONT COLOR="#009900">//attach it to the small image list&nbsp;
//--DON'T FORGET TO PUT m_smallImageList.Detach();&nbsp; in your destructor&nbsp;

</FONT><FONT COLOR="#990000">&nbsp;m_smallImageList.Attach(hSystemSmallImageList);&nbsp;

&nbsp; </FONT><FONT COLOR="#009900">//do the same for the large&nbsp;
</FONT><FONT COLOR="#990000">&nbsp;hSystemLargeImageList =&nbsp;
&nbsp; (HIMAGELIST)SHGetFileInfo(&nbsp;
&nbsp; (LPCTSTR)_T("C:\\"),&nbsp;
&nbsp; 0,&nbsp;
&nbsp; &amp;lsfi,&nbsp;
&nbsp; sizeof(SHFILEINFO),&nbsp;
&nbsp; SHGFI_SYSICONINDEX | SHGFI_ICON);&nbsp;
&nbsp;m_largeImageList.Attach(hSystemLargeImageList);&nbsp;

&nbsp;</FONT><FONT COLOR="#009900"> //Set the list control image list&nbsp;
</FONT><FONT COLOR="#990000">&nbsp;SetImageList(&amp;m_smallImageList, LVSIL_SMALL);&nbsp;
&nbsp;SetImageList(&amp;m_largeImageList, LVSIL_NORMAL);&nbsp;

}</FONT></TT></PRE>

<PRE><TT><FONT COLOR="#000000">You will also need a function to get the image ID for each item you would like to dispaly</FONT></TT></PRE>

<PRE><TT><FONT COLOR="#990000">int CSystemListCtrl::GetIconIndex(const CString&amp; csFileName)&nbsp; </FONT><FONT COLOR="#009900">//full path and file name
</FONT><FONT COLOR="#990000">{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SHFILEINFO&nbsp;&nbsp;&nbsp; sfi;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SHGetFileInfo(
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (LPCTSTR)csFileName,&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &amp;sfi,&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sizeof(SHFILEINFO),&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SHGFI_SYSICONINDEX | SHGFI_SMALLICON );

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return sfi.iIcon;
}</FONT></TT></PRE>

<PRE><FONT COLOR="#000000">Feed this result back into you ListCtrl LV_ITEM struct and you are on your way.</FONT></PRE>

<PRE><FONT COLOR="#000000">Note:&nbsp; Windows 95/98 returns a full image list upfront where as NT4.0 only will retreive the icons as you ask for them in the future.</FONT></PRE>

<PRE><FONT COLOR="#000000">
"If you do an imagecount on the imagelist right after you get the handle, you'll see the smaller imagelist.
Only until you iterate throught the various documents are they added to the NT imagelist." - Gil Rosin</FONT></PRE>

<PRE><FONT COLOR="#000000">
Thanks to Robert Edward Caldecott and Gil Rosin for pointing this out!&nbsp;</FONT><TT><FONT COLOR="#990000">&nbsp;&nbsp;&nbsp;
</FONT></TT></PRE>

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