/// <summary>
/// Retrives the name of the ShellItem.
/// </summary>
private void SetText()
{
// reserve memory for an unmanaged STRRET structure
// uType -> 4 bytes
// union -> MAX_PATH * 2
IntPtr strret = Marshal.AllocCoTaskMem((ShellAPI.MAX_PATH << 1) + 4);
// set strret to 0
Marshal.WriteInt32(strret, 0, 0);
StringBuilder buf = new StringBuilder(ShellAPI.MAX_PATH);
ShellAPI.HRESULT hr;
hr = parent.folder.GetDisplayNameOf(relPidl.Ptr,
ShellAPI.SHGNO.INFOLDER,
strret);
if (hr == ShellAPI.HRESULT.S_OK)
{
ShellAPI.StrRetToBuf(strret, relPidl.Ptr, buf, ShellAPI.MAX_PATH);
text = buf.ToString();
}
Marshal.FreeCoTaskMem(strret);
}