Error making hack [Coders pls help]

ehh some coder help me i beginneer so i stupid
got this stupid error keep saying
Error 1 error C3861: '_Health': identifier not found c:\users\cyberbex\documents\visual studio 2013\projects\hackbycyberbex\hackbycyberbex\source .cpp 14 1 HackByCyberBex
Error 2 error C3861: '_Health': identifier not found c:\users\cyberbex\documents\visual studio 2013\projects\hackbycyberbex\hackbycyberbex\source .cpp 15 1 HackByCyberBex
Error 3 error C3861: '_Health': identifier not found c:\users\cyberbex\documents\visual studio 2013\projects\hackbycyberbex\hackbycyberbex\source .cpp 16 1 HackByCyberBex
4 IntelliSense: identifier "_Health" is undefined c:\Users\cyberbex\Documents\Visual Studio 2013\Projects\HackByCyberBex\HackByCyberBex\Source .cpp 14 4 HackByCyberBex
5 IntelliSense: identifier "_Health" is undefined c:\Users\cyberbex\Documents\Visual Studio 2013\Projects\HackByCyberBex\HackByCyberBex\Source .cpp 15 3 HackByCyberBex

when i put this code

#include <Windows.h>
#define HP 0x101E15B0

BOOL Trigger;
void Name(DWORD dwH, DWORD dwA){
*(DWORD*)dwH = dwA;
}

void Init_Hack()
{
while (1)
{
if (GetAsyncKeyState(VK_INSERT) & 1)
_Health(HP, 999);
_Health(HP, 999);
_Health(HP, 999);
Trigger = !Trigger;
}
Sleep(10);
}

BOOL WINAPI DllMain(HMODULE hModule, DWORD dwReason, LPVOID lpReserved)
{
UNREFERENCED_PARAMETER(lpReserved);
if (dwReason == DLL_PROCESS_ATTACH)
{
CreateThread(0, 0, (LPTHREAD_START_ROUTINE)Init_Hack, 0, 0, 0);
}
return (TRUE);
}