Helphow to make chat menu

#include <windows.h>
#include <string>

void __memcpy__(VOID *lpMem, VOID *lpSrc, DWORD len)
{
	DWORD lpflOldProtect;
	unsigned char *pDst = (unsigned char )lpMem, *prc = (unsigned char *)lprc;

	VirtualProtect(lpMem, len, PAGE_READWRITE, &lpflOldProtect);
	
	while (len-- > 0)
		*pDst++ = *prc++;

	VirtualProtect(lpMem, len, lpflOldProtect, &lpflOldProtect);
}

DWORD WINAPI TagMark(LPVOID) 
	{
	while(1)
	{
if(GetAsyncKeyState(VK_INSERT))
	{
              char Radio1[] = "You MSG";
			__memcpy__((void*)0xRadioAddress, (void*)Radio1, strlen(Radio1) + 1);
	}
}

BOOL WINAPI DllMain ( HMODULE hDll, DWORD dwReason, LPVOID lpReserved )
{
DisableThreadLibraryCalls(hDll);

{
		CreateThread(0, 0, (LPTHREAD_START_ROUTINE)TagMark, 0, 0, 0);
	}
	return 1;
}