usage of win32api along with linkage instructions in the cmake

cc_examples.cc

#include <iostream> 
#include <chrono>
#include <thread>

// windows specific screensaver stuff 
// NB: you will need to download the windows sdk for this to work
// If you're running under cygwin, you should know that the headers cygwin provides for windows api development might
// not be the ones you're looking for (for example powerbase.h is not provided by cygwin to my knowledge). 
// I got this to compile under ms visual studio.

#include <windows.h>
#include <powerbase.h>

class Sleepless {
public:
	static void Enable() {
		// this is for screensaver
		SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED | ES_AWAYMODE_REQUIRED);

		// this is for power saving modes
		SYSTEM_POWER_POLICY powerPolicy;
		DWORD ret;
		DWORD size = sizeof(SYSTEM_POWER_POLICY);

		ret = CallNtPowerInformation(SystemPowerPolicyAc, nullptr, 0, &powerPolicy, size);
		if ((ret != ERROR_SUCCESS) || (size != sizeof(SYSTEM_POWER_POLICY))) {
			std::cout << "error calling nt power information" << std::endl;
			return;
		}

		powerPolicy.VideoTimeout = 1000;
		ret = CallNtPowerInformation(SystemPowerPolicyAc, &powerPolicy, size, nullptr, 0);

		if ((ret != ERROR_SUCCESS))
		{
			std::cout << "problem doing thing" << std::endl;
		}
	}
	static void Disable() {
		SetThreadExecutionState(ES_CONTINUOUS);
	}
private:
};

int main(int argc, char* argv[]) {
	Sleepless sleepless;

	std::cout << "disable sleeping" << std::endl;
	sleepless.Enable();

	std::this_thread::sleep_for(std::chrono::minutes(10));

	std::cout << "enable sleeping" << std::endl;
	sleepless.Disable();

	return 0;
}

CMakeLists.txt

cmake_minimum_required (VERSION 3.8)

# Add source to this project's executable.
add_executable (cc_examples "cc_examples.cpp" "cc_examples.h")
target_link_libraries(cc_examples PowrProf.dll)