[RESOLVED] Shell - Show Properties

[bergerkiller]

I know a couple of these threads exist on the internet, but none describe what I am having...

Public Structure SHELLEXECUTEINFO
        Public cbSize As Integer
        Public fMask As Integer
        Public hwnd As IntPtr
        <MarshalAs(UnmanagedType.LPTStr)> Public lpVerb As String
        <MarshalAs(UnmanagedType.LPTStr)> Public lpFile As String
        <MarshalAs(UnmanagedType.LPTStr)> Public lpParameters As String
        <MarshalAs(UnmanagedType.LPTStr)> Public lpDirectory As String
        Dim nShow As Integer
        Dim hInstApp As IntPtr
        Dim lpIDList As IntPtr
        <MarshalAs(UnmanagedType.LPTStr)> Public lpClass As String
        Public hkeyClass As IntPtr
        Public dwHotKey As Integer
        Public hIcon As IntPtr
        Public hProcess As IntPtr
    End Structure
    Private Const SEE_MASK_INVOKEIDLIST = &HC
    Private Const SEE_MASK_NOCLOSEPROCESS = &H40
    Private Const SEE_MASK_FLAG_NO_UI = &H400
    Private Const SW_SHOW As Integer = 5
    Private Declare Function ShellExecuteEx Lib "shell32.dll" Alias "ShellExecuteExA" (ByRef lpExecInfo As SHELLEXECUTEINFO) As Boolean
    Public Function ShowProps(ByVal FileName As String, ByVal OwnerhWnd As IntPtr) As Boolean
        Dim sei As New SHELLEXECUTEINFO
        sei.cbSize = Marshal.SizeOf(sei)
        sei.fMask = SEE_MASK_INVOKEIDLIST
        sei.hwnd = OwnerhWnd
        sei.lpVerb = "properties"
        sei.lpFile = FileName
        sei.lpParameters = vbNullChar
        sei.lpDirectory = vbNullChar
        sei.nShow = SW_SHOW
        sei.hInstApp = 0
        sei.lpIDList = 0
        Return ShellExecuteEx(sei)
    End Function

(import Marshal btw)

When I first ran the code, it worked. But after some days (now) it suddenly stopped working, and only displays an error with, for example:

"Windows cannon find 'C'. Make sure you type the name correctly, and then try again.

This, while I send the request for the file of "C:\test.txt". It only seems to read the first character. What is going on here?

(Running on Window 7)