SetWindowDisplayAffinity 不适用于 MFC windows

Question

I have 1 Picture Control and want to make it not screen record-able .
In.Net, I have been using SetWindowDisplayAffinity :

WDA_MONTOR = 1;
SetWindowDisplayAffinity(this.Handle, WDA_MONTOR); 

Now I have moved to MFC for native performance.
I am using this following code which don't prevent screenshots :

HWND Handle = this->GetDlgItem(IDC_SCREEN)->m_hWnd;
SetWindowDisplayAffinity(Handle, WDA_MONITOR);

Complete example:

if(SetWindowDisplayAffinity(hWnd, WDA_MONITOR)==false)
{
    wchar_t buf[256];
    FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        buf, (sizeof(buf) / sizeof(wchar_t)), NULL);
    AfxMessageBox(buf);
}

GetLastError says "parameter is incorrect".

Answer 1

According to Raymond chen :

The .NET version was passing the form's window handle (a top-level window), but your MFC version is passing a control's window handle (a child window). Use the top-level window.

That's mean I would have to use Form handle instead of PictureBox handle. So change

HWND Handle = this->GetDlgItem(IDC_SCREEN)->m_hWnd; //PictureBox handle
SetWindowDisplayAffinity(Handle, WDA_MONITOR);

to

HWND Handle = this->m_hWnd;      //form handle
SetWindowDisplayAffinity(Handle, WDA_MONITOR);

Reason: Form window is parent and top-level window.