https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-createwindowa Creating a new window.
HWND window = CreateWindow("Window name", "My First Game", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, 1280, 720, 0, 0, hInstance,0);Getting Handle
HDC hdc = GetDC(window);