Windows Hook

[Rich Brockway]

I am creating a shell app. Essentially, I want to start an exe after a user clicks a button and intercept certain messages, like WM_RESIZE...

Here is the rough code. My best reference book, Advanced Windows, is in storage.

#Compile Exe

#Include "WIN32API.INC"
#Include "COMMCTRL.INC"
%IDOK       = 1
%IDCANCEL   = 2


%BS_DEFAULT = 1

$APP_NAME = "Shell"

CallBack Function OkButton()

    Dim lHandle As Long
    lHandle =Shell("...")

    REM Problem Here.....
    SetWindowsHookEx(3,AppWndProc,lHandle,  0)

End Function

CallBack Function CancelButton()

  Dialog End CbHndl, 0

End Function

'----------------------------------------------------------------

Function PbMain () As Long

  $Register None

  Local hDlg   As Long
  Local result As Long

' ** Create a new dialog template
  Dialog New 0, $APP_NAME, ,, 100, 45, %WS_SYSMENU, 0 To hDlg


' ** Add controls to it
  Control Add Button, hDlg, %IDOK, "Start", 5, 5, 40, 14, %BS_DEFAULT Call OkButton
  Control Add Button, hDlg, %IDCANCEL, "&Cancel", 50, 5, 40, 14, 0 Call CancelButton


' ** Display the dialog
  Dialog Show Modal hDlg To result


End Function
Function AppWndProc (ByVal hWnd As Long, ByVal wMsg As Long,ByVal wParam As Long, ByVal lParam As Long) As Long


End Function

Thanks In Advance,

RB

[Lance Edmonds]

I'm not at my DEV PC to check this, but in general, hook functions that are not "local" to your app must be placed into a DLL. Also, you'd need to pass the address of your WndProc, so you'll need to use CODEPTR(). Finally, I recall that the value returned by SHELL() is an instance handle rather than a process handle...

When I get back to my DEV PC, I'll double check these facts.




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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>