Code:
'access all bmp files within a folder

Private Sub Command1_Click()
    Dim stFile As String
    Dim stDir As String
    Dim myArr()
    Dim i As Integer
    
    stDir = "C:\Test\"
    stFile = Dir$(stDir & "*.bmp")
    
    Do While stFile <> ""
       ReDim Preserve myArr(i)
'if you want the path as well it would be
'myarr(i) = stdir & stfile    
      myArr(i) = stFile
      i = i + 1
      stFile = Dir
    Loop

End Sub