Hi, I've read a lot of threads here about how to show a window inside FSX and wanted to try it myself now. I have to admit that I'm not really an expert in WinAPI programming and from what I've seen there's still nobody here who knows how to show a modeless window in fullscreen and window mode. But I can't even get a modal window to show up inside the FSX. I started off with the SimConnect example which enables the Dialog Mode and then tried to get the handle to the FS window and create a child window, but nothing happens. Here's what I did when the Dialog Mode is turned on: Code: hFSimWindow = FindWindow((LPCWSTR)"FS98MAIN", NULL); hInst = (HINSTANCE)GetWindowLong( hFSimWindow, GWL_HINSTANCE ); WNDCLASSEX wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = (WNDPROC)WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInst; wcex.hIcon = NULL; wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = NULL; wcex.lpszClassName = (LPCWSTR)L"TestModule"; wcex.hIconSm = NULL; RegisterClassEx(&wcex); hWnd = CreateWindowEx(WS_EX_TOPMOST,wcex.lpszClassName, (LPCWSTR)L"TestModule", WS_CHILD | WS_CAPTION | WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 300, 200, hFSimWindow, NULL, hInst, NULL); What am I doing wrong here? And has anyone made progress regarding modeless windows?