Image Recognition Using VB6

[leonard1968]

Good Day Guys,
I am trying to develop a system that will connect my webcam into a my vb 6 application system.. I searched through the internet and found some code.. Although i made my system run, i can't fully understand those codes i have copied from the net...

Here's the codes, i know there were lot of you guys who can interpret me these codes..
Another thing is, these codes where written into a module..My question is, Is it really necessary to write these codes into a separate module? Why?

Public Const ws_child As Long = &H40000000
Public Const ws_visible As Long = &H10000000

Global Const WM_USER = 1024
Global Const wm_cap_driver_connect = WM_USER + 10
Global Const wm_cap_set_preview = WM_USER + 50
Global Const WM_CAP_SET_PREVIEWRATE = WM_USER + 52
Global Const WM_CAP_DRIVER_DISCONNECT As Long = WM_USER + 11
Public Const WM_CAP_DLG_VIDEOFORMAT As Long = WM_USER + 41
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Declare Function capCreateCaptureWindow Lib "avicap32.dll" Alias "capCreateCaptureWindowA" (ByVal a As String, ByVal b As Long, ByVal c As Integer, ByVal d As Integer, ByVal e As Integer, ByVal f As Integer, ByVal g As Long, ByVal h As Integer) As Long

Hope you'll help me understand these things...thank you...