It's called an argument. Almoast every app works like this - "App.exe file". It has to be in it's main method/function. Try. Otherview, you can use this function, which calls default browser and opens a webpage:
VB Code:
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
Public Function HyperJump(ByVal URL As String) As Long
HyperJump = ShellExecute(0&, vbNullString, URL, vbNullString, vbNullString, vbNormalFocus)
End Function
'usage HyperJump "http://www.google.com