Black screen - how do do?

[Loevenson]

There is a software for controlling of light measuring devices.

The software should be able to blacken the entire computer screen during the measurement (to avoid the influence of the computer screen on measuring results).

What would be the best idea to realize this?

Graphical API-functions? Standby mode? Black popup window larger than the screen 🙂 ?

Thank in advance.

[RobertoBozzolo]

The last one is probably the easiest solution you can imagine; the only difference I would use is to set the window as maximized an hide the title bar,  so that no frame is displayed on the screen:

SetPanelAttribute (panelHandle,  ATTR_TITLEBAR_VISIBLE, 0);

SetPanelAttribute (panelHandle,  ATTR_WINDOW_ZOOM, VAL_MAXIMIZE);