A system image list contains each file, folder, shortcut, etc. ‘s icon. This can come
in very handy for creating a custom explore type application. 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 to your list control. Don’t forget to Detach() them after you
are done or else all the icons on the system will disappear and a reboot seems to be the only fix.
Create the following member variables in you list control class:
CImageList m_smallImageList;
CImageList m_largeImageList;
And add this function:
void CSystemListCtrl::InitializeSystemImageList()
{
//image list setup
HIMAGELIST hSystemSmallImageList, hSystemLargeImageList;
SHFILEINFO ssfi, lsfi;
//get a handle to the system small icon list
hSystemSmallImageList =
(HIMAGELIST)SHGetFileInfo(
(LPCTSTR)_T(“C:\”),
0,
&ssfi,
sizeof(SHFILEINFO),
SHGFI_SYSICONINDEX | SHGFI_SMALLICON);
//attach it to the small image list
//–DON’T FORGET TO PUT m_smallImageList.Detach(); in your destructor
m_smallImageList.Attach(hSystemSmallImageList);
//do the same for the large
hSystemLargeImageList =
(HIMAGELIST)SHGetFileInfo(
(LPCTSTR)_T(“C:\”),
0,
&lsfi,
sizeof(SHFILEINFO),
SHGFI_SYSICONINDEX | SHGFI_ICON);
m_largeImageList.Attach(hSystemLargeImageList);
//Set the list control image list
SetImageList(&m_smallImageList, LVSIL_SMALL);
SetImageList(&m_largeImageList, LVSIL_NORMAL);
}
You will also need a function to get the image ID for each item you would like to dispaly
int CSystemListCtrl::GetIconIndex(const CString& csFileName) //full path and file name
{
SHFILEINFO sfi;
SHGetFileInfo(
(LPCTSTR)csFileName,
0,
&sfi,
sizeof(SHFILEINFO),
SHGFI_SYSICONINDEX | SHGFI_SMALLICON );
return sfi.iIcon;
}
Feed this result back into you ListCtrl LV_ITEM struct and you are on your way.
Note: 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.
“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
Thanks to Robert Edward Caldecott and Gil Rosin for pointing this out!