SetWindowPos example...?

[AlvaroF1]

I'd like a simple example of SetWindowPos to center the Printer Dialog (from the Windows Commom Dialog) on the screen.

Thanks.

[Chris]

you got to find the print dialog window handle (hWnd) first and then just applied this handle in the SetWindowPos first parameter will do.

regards,

[Hack]

The SetWindowPos function changes the size, position, and Z order of a child, pop-up, or top-level window.
Child, pop-up, and top-level windows are ordered according to their appearance on the screen. The topmost
window receives the highest rank and is the first window in the Z order.

Const HWND_TOPMOST = -1
Const HWND_NOTOPMOST = -2
Const SWP_NOSIZE = &H1
Const SWP_NOMOVE = &H2
Const SWP_NOACTIVATE = &H10
Const SWP_SHOWWINDOW = &H40
Private Declare Sub SetWindowPos Lib "User32" (ByVal hWnd As Long, ByVal hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long)
 
Private Sub Form_Activate()
    'KPD-Team 1998
    'URL: [url]http://www.allapi.net/[/url]
    'E-Mail: [email][email protected][/email]
    'Set the window position to topmost
    SetWindowPos Me.hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE Or SWP_SHOWWINDOW Or SWP_NOMOVE Or SWP_NOSIZE
End Sub

[AlvaroF1]

Thanks Hack, but it does not work.

[Hack]

I did a little web searching last night. See if this works for you.

'In a Bas Module
' Centrdlg sample by Matt Hart - [email][email protected][/email]
' [url]http://matthart.com[/url]
 
Public Type CWPSTRUCT
    lParam As Long
    wParam As Long
    message As Long
    hwnd As Long
End Type
 
Public Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type
 
Public Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal ncode As Long, ByVal wParam As Long, lParam As Any) 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 Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Public Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
Public Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Public Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hHook As Long) As Long
 
Public Const WH_CALLWNDPROC = 4
Public Const WM_INITDIALOG = &H110
Public Const GWL_WNDPROC = (-4)
Public Const SWP_NOSIZE = &H1
Public Const SWP_NOACTIVATE = &H10
 
Public lWndProc As Long
Public hHook As Long, lHookWndProc As Long
 
Public Function AppHook(ByVal idHook As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    Dim CWP As CWPSTRUCT
    CopyMemory CWP, ByVal lParam, Len(CWP)
    Select Case CWP.message
        Case WM_INITDIALOG
            lWndProc = SetWindowLong(CWP.hwnd, GWL_WNDPROC, AddressOf Dlg_WndProc)
            AppHook = CallNextHookEx(hHook, idHook, wParam, ByVal lParam)
            UnhookWindowsHookEx hHook
            hHook = 0
            Exit Function
    End Select
    AppHook = CallNextHookEx(hHook, idHook, wParam, ByVal lParam)
End Function
 
Public Function Dlg_WndProc(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    Select Case Msg
        Case WM_INITDIALOG
            Dim R As RECT, x As Long, y As Long
            GetWindowRect hwnd, R
            x = (Form1.Left \ Screen.TwipsPerPixelX + (Form1.Width \ Screen.TwipsPerPixelX - (R.Right - R.Left)) \ 2)
            y = (Form1.Top \ Screen.TwipsPerPixelY + (Form1.Height \ Screen.TwipsPerPixelY - (R.Bottom - R.Top)) \ 2)
            SetWindowPos hwnd, 0, x, y, 0, 0, SWP_NOSIZE Or SWP_NOACTIVATE
            SetWindowLong hwnd, GWL_WNDPROC, lWndProc
    End Select
    Dlg_WndProc = CallWindowProc(lWndProc, hwnd, Msg, wParam, lParam)
End Function
 
'on the form with the common dialog control
Private Sub Command1_Click()
' Centrdlg sample by Matt Hart - [email][email protected][/email]
' [url]http://matthart.com[/url]
'
' This sample shows the how to use subclassing to process the
' dialog messages and move the dialog.
'
' It's actually a bit easier if you use the API common dialog
' functions rather than the control. You can specify a callback
' procedure when you create the dialog rather than having to mess
' with hooking the application so that you can watch for the
' dialog to receive the WM_INITDIALOG message.
'
' However, you can see that I immediately unhook and unsubclass
' the application as soon as I finish processing the needed
' message. That leaves nothing "messy" hanging around. I do double
' check that the hook is released in case there was some kind
' of error attempting to create the dialog.
'
' There's also another way to do it - use the DWL_DLGPROC to
' set a pointer to a dialog box procedure. However, I found that
' using this method doesn't seem to work very well with VB's
' common dialog control.
'
' Note that this sample [sort of] uses the method I created for
' my "setting windows styles" article in Visual Basic Programmer's
' Journal - an application hook to watch for messages as an object
' is being created.
    hHook = SetWindowsHookEx(WH_CALLWNDPROC, AddressOf AppHook, App.hInstance, App.ThreadID)
    CommonDialog1.ShowPrinter
    If hHook Then UnhookWindowsHookEx hHook
End Sub