' /* Code Taken From: http://forums.devx.com/showthread.php?t=148627 */
Public Declare Function GetOpenFileName Lib "comdlg32.dll" Alias "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
 
Public Type OPENFILENAME
    lStructSize As Long
    hwndOwner As Long
    hInstance As Long
    lpstrFilter As String
    lpstrCustomFilter As String
    nMaxCustFilter As Long
    nFilterIndex As Long
    lpstrFile As String
    nMaxFile As Long
    lpstrFileTitle As String
    nMaxFileTitle As Long
    lpstrInitialDir As String
    lpstrTitle As String
    flags As Long
    nFileOffset As Integer
    nFileExtension As Integer
    lpstrDefExt As String
    lCustData As Long
    lpfnHook As Long
    lpTemplateName As String
End Type
 
public Function SelectFileOpenDialog()
Dim strTemp, strTemp1, pathStr As String
Dim i, n, j As Long
Dim OpenFile As OPENFILENAME
Dim lReturn As Long
Dim sFilter As String
Dim Fname As String
 
OpenFile.lStructSize = Len(OpenFile)
sFilter = "Text Files (*.txt)" & Chr(0) & "*.TXT" & Chr(0)
OpenFile.lpstrFilter = sFilter
OpenFile.nFilterIndex = 1
OpenFile.lpstrFile = String(257, 0)
OpenFile.nMaxFile = Len(OpenFile.lpstrFile) - 1
OpenFile.lpstrFileTitle = OpenFile.lpstrFile
OpenFile.nMaxFileTitle = OpenFile.nMaxFile
OpenFile.lpstrInitialDir = "C:\"
OpenFile.lpstrTitle = "Select File"
OpenFile.flags = 0
 
lReturn = GetOpenFileName(OpenFile)
 
If lReturn = 0 Then
MsgBox "You didn't select any file"
Else
'MsgBox "The user Chose " & Trim(OpenFile.lpstrFile)
 
Fname = Trim$(OpenFile.lpstrFileTitle) ' copy the filename to "Fname"
 
n = FileLen(OpenFile.lpstrFile) 'length of the file
 
End Function

Private Sub Form_Load()
SelectFileOpenDialog
End Sub

dim objExcel
dim objworkbook
Set objExcel = CreateObject("Excel.Application")
Set objWorkbook = objExcel.Workbooks.Open(file_from_dialogbox_here)
objExcel.visible = true
 
set objExcel = nothing
set objWorkbook = nothing