Newbie : Processing Other Windows Messages

Hi,
If someone could guide me to a website, book, .. any resource
to find info about how to check for standard windows messages
WM_*, EM_* and so on. And how to declare the handlers (functions, subs)
Any help is greatly appreciated.
Thank You
Dennis

You need to subclass you App.

Add to a Module

VB Code:

Public Declare Function SetWindowLong& Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long)
Public Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Const GWL_WNDPROC = (-4)
Public WndProcOld As Long
Private Const WM_CLOSE = &H10
 
Public Function WindProc(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    If hwnd = WM_CLOSE Then MsgBox "App is closing"
    WindProc = CallWindowProc(WndProcOld&, hwnd&, wMsg&, wParam&, lParam&)
End Function
 
Sub SubClassWnd(hwnd As Long)
    WndProcOld& = SetWindowLong(hwnd, GWL_WNDPROC, AddressOf WindProc)
End Sub
 
Sub UnSubclassWnd(hwnd As Long)
    SetWindowLong hwnd, GWL_WNDPROC, WndProcOld&
    WndProcOld& = 0
End Sub

Usage:

VB Code:

Private Sub Form_Load()
    SubClassWnd hwnd
End Sub
 
Private Sub Form_Unload(Cancel As Integer)
    UnSubclassWnd hwnd
End Sub