Set your wallpaper as background of a dialog box
One day I was messing around with a dialog based application and I found that I can set my wallpaper as dialog's background. I don't know how it did though :).
Create a dialog based application and replace your OnPaint code with this code.
void CDlgFontDlg::OnPaint()
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
if (IsIconic())
{
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
hdc = dc.GetSafeHdc() ;
::SetBkColor( hdc , RGB(255, 0, 100));
CDialog::OnPaint();
}
}