I`ve just found the solution to this problem this morning.
You need to get a handle of the system image list with SHGetFileInfo
(more information in MSDN), and force the listview to get the imagelist from the system image list handle with SendMessage and LVM_SETIMAGELIST
it shoul look something like this:
....
private System.Windows.Forms.ListView lstViewLeft;
IntPtr hImgSmall; //the handle to the system image list
SHFILEINFO shinfo = new SHFILEINFO();
//SHFILEINFO is not defined if you use C# like me
//
//set the listview imagelist to system`s image list (1 is for SmallImageList)
SendMessage(this.lstViewLeft.Handle, LVM_SETIMAGELIST, 1 ,(UInt32)hImgSmall);
//and then get the icon index on every file you want with
SHGetFileInfo(FilePath, 0, ref shinfo,(uint)Marshal.SizeOf(shinfo),SHGFI_SYSICONINDEX | SHGFI_SMALLICON );
the item you add in the imagelist hould hade the image index
shinfo.iIcon
I`me just cutting and pasting code from my program so search for help on the methods and data structures yourself to understand how they work.
If you don`t use the system imagelist I don`t know any other way to get the icons that are not distorted.
