public static IntPtr extractIcon(Object parentIShellFolder, IntPtr relativePIDL, Boolean getLargeIcon)
{
if (parentIShellFolder == null || relativePIDL == IntPtr.Zero)
{
return(IntPtr.Zero);
}
ShellApi.IShellFolder folder = (ShellApi.IShellFolder)parentIShellFolder;
Guid guid = new Guid("000214fa-0000-0000-c000-000000000046");
object ppv;
if (folder.GetUIObjectOf(IntPtr.Zero, 1, new IntPtr[] { relativePIDL }, ref guid, IntPtr.Zero, out ppv) == 0)
{
ShellApi.IExtractIcon extractor = (ShellApi.IExtractIcon)ppv;
int size = 1024;
StringBuilder path = new StringBuilder(size);
int piIndex;
uint pwFlags;
if (extractor.GetIconLocation((uint)ShellApi.GIL.GIL_FORSHELL, path, size, out piIndex, out pwFlags) == 0)
{
IntPtr hIconL = new IntPtr();
IntPtr hIconS = new IntPtr();
if (extractor.Extract(path.ToString(), (uint)piIndex, out hIconL, out hIconS, (16 << 16) + 32) == 0)
{
if (getLargeIcon)
{
ShellApi.DestroyIcon(hIconS);
return(hIconL);
}
else
{
ShellApi.DestroyIcon(hIconL);
return(hIconS);
}
}
}
}
return(IntPtr.Zero);
}
public static void disposeIcon(IntPtr hIcon)
{
ShellApi.DestroyIcon(hIcon);
}