Used in my blog http://moustafasaleh.blogspot.com/2015/03/using-windows-native-apis-with-cl-and.html

ZwDelayExecution1.cpp

/*
 http://moustafasaleh.blogspot.com/ (@msaleh83)
 Example of dynamically linking ZwDelayExecution Windows internal API
 
 compile: 
 cl ZwDelayExecution1.cpp kernel32.lib user32.lib
 gcc ZwDelayExecution1.cpp -o ZwDelayExecution1.exe
*/

#define UNICODE
#define _UNICODE
#include <windows.h>

#pragma comment(linker,"/entry:main")           // for CL

typedef  DWORD (__stdcall *pfZwDelayExecution)(BOOLEAN, __int64*); 

int foo()
{
    HMODULE hm = LoadLibrary(L"ntdll");
    pfZwDelayExecution ZwDelayExecution = (pfZwDelayExecution)GetProcAddress(hm, "ZwDelayExecution");
    
    MessageBox(0,L"Before the delay",L"@msaleh83",0);
    
    __int64 x = -20000000;                      // sleep for 2 seconds (100 ns granuality)
    ZwDelayExecution(FALSE, &x);
    
    MessageBox(0,L"After the delay",L"@msaleh83",0);
    
    return 0;
}

int main(int argc, char* argv[]) {
    foo();
    ExitProcess(0);
}