Help source code hack

#include <windows.h>
#include <stdio.h>

bool wh=false;


void CrazyVladHack()
{
    while(1){
		if(GetAsyncKeyState(VK_INSERT) &1){
			wh= !wh;
		}
		if(wh==true){
			DWORD Addy_ESP = *(DWORD*)0x007440;
			if(Addy_ESP != 0)
				*(float*)(Addy_ESP + 0x007) = 100;
		}
		Sleep(50);
	}
}

BOOL WINAPI DllMain(HINSTANCE module, DWORD dwReason, LPVOID lpvReserved)
{
	if(dwReason == DLL_PROCESS_ATTACH)
	{
		CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)CrazyVladHack, NULL, NULL, NULL);
		MessageBoxA(0, "Inject CrazyVladHACK", "Good!",0);
	}
	return TRUE;
}

DWORD Addy_ESP = *(DWORD*)0x007440;
			if(Addy_ESP != 0)
				*(float*)(Addy_ESP + 0x007) = 100;