Novice question: Why the listbox or button above can't be seen after the picture is used as the background, just click

9cshit

The novice asks: After using the picture as the background, the listbox or button above can not be seen, and can be displayed by clicking it. The other windows cannot be seen when they are covered again. What is the problem and how to solve it!

asty521

I also encountered a similar problem, I don't know how to solve it, please enlighten me !!!!

9cshit

Go up, why are there no masters?

红旗下de蛋

How do you do it, how do you paste the background image, can you paste the code?

9cshit

I added a picture control in VC
But don't know how to set it to the lowest level

hoffmann1234

HBRUSH CAaaDlg :: OnCtlColor (CDC * pDC, CWnd * pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog :: OnCtlColor (pDC, pWnd, nCtlColor);
Ranch
// Set transparent background mode
pDC-> SetBkMode (TRANSPARENT);
// Set the background brush to empty
return (HBRUSH) :: GetStockObject (HOLLOW_BRUSH);
}

9cshit

Can you explain

红旗下de蛋

Set the tab order of the image control to the smallest, that is, the first one, which is at the lowest level.

9cshit

No good still the same

hoffmann1234

BOOL CAaaDlg :: OnInitDialog ()
{
CDialog :: OnInitDialog ();
// Load the bitmap
m_Back.LoadBitmap (IDB_BITMAP1);
Ranch
return TRUE; // return TRUE unless you set the focus to a control
}

BOOL CAaaDlg :: OnEraseBkgnd (CDC * pDC)
{
CDC dc;
dc.CreateCompatibleDC (pDC);
dc.SelectObject (&m_Back);

// Get the BITMAP object
BITMAP hb;
m_Back.GetBitmap (&hb);

// Get window size
CRect rt;
GetClientRect (&rt);
// Display bitmap
pDC-> StretchBlt (0, 0, rt.Width (), rt.Height (),
&dc, 0, 0, hb.bmWidth, hb.bmHeight, SRCCOPY);

return TRUE;
// return CDialog :: OnEraseBkgnd (pDC);
}

HBRUSH CAaaDlg :: OnCtlColor (CDC * pDC, CWnd * pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog :: OnCtlColor (pDC, pWnd, nCtlColor);
Ranch
// Set transparent background mode
pDC-> SetBkMode (TRANSPARENT);
// Set the background brush to empty
return (HBRUSH) :: GetStockObject (HOLLOW_BRUSH);
}