C / C++ / MFC

<br />
// Create a new CWnd object<br />
CWnd* pNotepadWin = new CWnd;<br />
<br />
// Attach it to Notepad<br />
// Use Microsoft SPY to determine the class name of Notepad's window<br />
HWND hwndNotepad = ::FindWindow( ClassName, NULL ) );<br />
<br />
if ( hwndNotepad )<br />
{<br />
     pNotepadWin->Attach( hwndNotepad );<br />
}<br />
else<br />
{<br />
     delete pNotepadWin;<br />
     return FALSE;<br />
}<br />
<br />

<br />
// Create a CWnd pointer<br />
CWnd* pNotepadEdit;<br />
<br />
// Get the first child window of Notepad Window<br />
pNotepadEdit = pNotepadWin->GetTopWindow();<br />
<br />
// If the window has no children (It is not Notepad then !)<br />
if ( !pNotepadEdit )<br />
{<br />
    // Detach our CWnd from the Notepad.<br />
    pNotepadWin->Detach();<br />
<br />
    // Delete it<br />
    delete pNotepadWin;<br />
    return FALSE;<br />
}<br />
<br />
// Enumeration: Find a child window which qualifies as an edit control<br />
bool bContinue = true;<br />
while ( bContinue )<br />
{<br />
    // Variables<br />
    CString strName;<br />
<br />
    // Get this window's class name<br />
    ::GetClassName(pNotepadEdit->m_hWnd, (LPTSTR) strName, 20);<br />
<br />
    // Is it an edit control ?<br />
    if ( strName.CompareNoCase("Edit") == 0 )<br />
          bContinue = false;<br />
<br />
    // Nope, so try to get the next one<br />
    pNotepadEdit = pNotepadEdit->GetNextWindow(GW_HWNDNEXT);<br />
<br />
    if ( !pNotepadEdit )<br />
    {<br />
        // No more child windows<br />
        bContinue = false;<br />
    }<br />
}<br />
<br />

HWND  h = ::FindWindowW(AppName, NULL);
if( h ) {
	// Set focus to foremost child window.
	// The "| 0x01" is used to bring any owned windows to the
	// foreground and activate them.
	::SetForegroundWindow( (HWND)((ulong)h|0x00000001) );
	return(true);
}