Re: How to make CFileDialog, MessageBox etc ..Layered ?

From:

Matrixinline <anup.kataria@gmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 9 Oct 2009 02:15:43 -0700 (PDT)

Message-ID:

<705de6fd-bfd4-4675-be7d-4625186d4e3d@2g2000prl.googlegroups.com>

On Oct 7, 11:27 pm, Mikel <mikel.l...@gmail.com> wrote:

On Oct 8, 7:33 am, Matrixinline <anup.kata...@gmail.com> wrote:

Hi All,

Can you please tell me how to make CFileDialog, MessageBox, Tooltips
layered.

I tried to extend the CFileDialog and in the OnInitDialogMethod I have
written following line but it did not changed anything for it.

BOOL bTrue = ModifyStyleEx(0, WS_EX_LAYERED);
SetLayeredWindowAttributes(0,20,LWA_ALPHA);

Please let me know how to make the dialog layered.

Thanks
Anup

Well, I've never done this, but inhttp://msdn.microsoft.com/en-us/library=

/ms997507.aspx

you can read:
"For any layering to take place, the WS_EX_LAYERED bit needs to be
set, either at window creation time or by calling SetWindowLong with
GWL_EXSTYLE"
And gives an example:

// Set WS_EX_LAYERED on this window
SetWindowLong(hwnd, GWL_EXSTYLE,
GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_LAYERED);
// Make this window 70% alpha
SetLayeredWindowAttributes(hwnd, 0, (255 * 70) / 100, LWA_ALPHA);

So it seems that you have to use SetWindowLong, not ModifyStyleEx, or
create it as layered. But as I said at the start, I've never done this.

No even it did not helped me.

Please let me know if I am doing wrong
Here is the code

class CMySaveAsDialog : public CFileDialog
{
public:
    CMySaveAsDialog(BOOL bOpenFileDialog,
   LPCTSTR lpszDefExt = NULL,
   LPCTSTR lpszFileName = NULL,
   DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
   LPCTSTR lpszFilter = NULL,
   CWnd* pParentWnd = NULL,
   DWORD dwSize = 0
   ):CFileDialog(bOpenFileDialog,
   lpszDefExt,
   lpszFileName ,
   dwFlags ,
   lpszFilter ,
   pParentWnd ,
   dwSize )

    {};

    virtual BOOL OnInitDialog()
    {
        CFileDialog::OnInitDialog();
        BOOL bTrue = ModifyStyleEx(WS_EX_TRANSPARENT, WS_EX_LAYERED);
        SetLayeredWindowAttributes(0,20,LWA_ALPHA);

        SetWindowLong(this->m_hWnd, GWL_EXSTYLE, GetWindowLong(this->m_hWnd,
GWL_EXSTYLE) | WS_EX_LAYERED);
        // Make this window 70% alpha
        SetLayeredWindowAttributes( 0, 10, LWA_ALPHA);
        RedrawWindow( NULL, NULL, RDW_ERASE | RDW_INVALIDATE | RDW_FRAME |
RDW_ALLCHILDREN);

        return TRUE;
    };
};