How detect current screen resolution?

Question

How do I from Winapi (in C or C++) detect the current screen resolution?

Some background:

I want to start a new OpenGL fullscreen window, but want it open wi

Answer 1

I use the GetSystemMetrics function

GetSystemMetrics(SM_CXSCREEN) returns screen width(in pixels)

GetSystemMetrics(SM_CYSCREEN) - height in pixels

https://msdn.microsoft.com/en-us/library/windows/desktop/ms724385%28v=vs.85%29.aspx