Function DXUTSetWindow

framework/d3d11/dxut/Core/DXUT.cpp:1124–1179

-------------------------------------------------------------------------------------- Sets a previously created window for the framework to use. If DXUTInit() has not already been called, it will call it with the default parameters. Instead of calling this, you can call DXUTCreateWindow() to create a new window. ------------------------------------------------------------------------------------

// Instead of calling this, you can call DXUTCreateWindow() to create a new window.  
//--------------------------------------------------------------------------------------
_Use_decl_annotations_
HRESULT WINAPI DXUTSetWindow( HWND hWndFocus, HWND hWndDeviceFullScreen, HWND hWndDeviceWindowed, bool bHandleMessages )
{
    HRESULT hr;

    // Not allowed to call this from inside the device callbacks
    if( GetDXUTState().GetInsideDeviceCallback() )
        return DXUT_ERR_MSGBOX( L"DXUTCreateWindow", E_FAIL );

    GetDXUTState().SetWindowCreateCalled( true );

    // To avoid confusion, we do not allow any HWND to be nullptr here.  The
    // caller must pass in valid HWND for all three parameters.  The same
    // HWND may be used for more than one parameter.
    if( !hWndFocus || !hWndDeviceFullScreen || !hWndDeviceWindowed )
        return DXUT_ERR_MSGBOX( L"DXUTSetWindow", E_INVALIDARG );

    // If subclassing the window, set the pointer to the local window procedure
    if( bHandleMessages )
    {
        // Switch window procedures
        LONG_PTR nResult = SetWindowLongPtr( hWndFocus, GWLP_WNDPROC, (LONG_PTR)DXUTStaticWndProc );

        DWORD dwError = GetLastError();
        if( nResult == 0 )
            return DXUT_ERR_MSGBOX( L"SetWindowLongPtr", HRESULT_FROM_WIN32(dwError) );
    }

    if( !GetDXUTState().GetDXUTInited() )
    {
        // If DXUTInit() was already called and failed, then fail.
        // DXUTInit() must first succeed for this function to succeed
        if( GetDXUTState().GetDXUTInitCalled() )
            return E_FAIL;

        // If DXUTInit() hasn't been called, then automatically call it
        // with default params
        hr = DXUTInit();
        if( FAILED( hr ) )
            return hr;
    }

    WCHAR* strCachedWindowTitle = GetDXUTState().GetWindowTitle();
    GetWindowText( hWndFocus, strCachedWindowTitle, 255 );
    strCachedWindowTitle[255] = 0;

    HINSTANCE hInstance = ( HINSTANCE )( LONG_PTR )GetWindowLongPtr( hWndFocus, GWLP_HINSTANCE );
    GetDXUTState().SetHInstance( hInstance );
    GetDXUTState().SetWindowCreatedWithDefaultPositions( false );
    GetDXUTState().SetWindowCreated( true );
    GetDXUTState().SetHWNDFocus( hWndFocus );
    GetDXUTState().SetHWNDDeviceFullScreen( hWndDeviceFullScreen );
    GetDXUTState().SetHWNDDeviceWindowed( hWndDeviceWindowed );

    return S_OK;
}