Hey,
I'm not sure if I put my stuff correctly in the message loop(Render()):

while(GetMessage(&msg, NULL, 0, 0) > 0)
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
		
		if(!Graphics::Obj().Render())
		{
			MessageBox(NULL, "Failed to render", "Error", MB_OK | MB_ICONEXCLAMATION);
			break;
		}
	}

becouse when I close the window I get an error from the MessageBox function above. Probably becouse when I'm handling messages before rendering the window is firstly destroyed and then DirectX doesn't have a window to draw on. When I put my Render() function above translating and dispatching messages I don't get the error, but mostly people advise to handle messages before doing anything else?This is how I'm handling messages to close window:

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
	switch( msg )
	{
	case WM_CLOSE:
		DestroyWindow( hwnd );
		break;
	  
	case WM_DESTROY:
		PostQuitMessage( 0 );
		break;
	 //...
default:
		return DefWindowProc( hwnd, msg, wParam, lParam );
	 }
return 0;
}

Hey,
I'm not sure if I put my stuff correctly in the message loop(Render()):

while(GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
        
        if(!Graphics::Obj().Render())
        {
            MessageBox(NULL, "Failed to render", "Error", MB_OK | MB_ICONEXCLAMATION);
            break;
        }
    }

becouse when I close the window I get an error from the MessageBox function above. Probably becouse when I'm handling messages before rendering the window is firstly destroyed and then DirectX doesn't have a window to draw on. When I put my Render() function above translating and dispatching messages I don't get the error, but mostly people advise to handle messages before doing anything else?This is how I'm handling messages to close window:

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
    switch( msg )
    {
    case WM_CLOSE:
	    DestroyWindow( hwnd );
	    break;
	   
    case WM_DESTROY:
	    PostQuitMessage( 0 );
	    break;
	 //...
default:
	    return DefWindowProc( hwnd, msg, wParam, lParam );
	 }
}