GlobalMemoryStatusEx()在VC6.0下的编译

在VC6.0下,使用 GlobalMemoryStatusEx 会出现  

'GlobalMemoryStatus'  undeclared identifier

解决方法:

 动态加载DLL方式调用.

int getTotalRAM(void) { 
  int ret = 0; 
  DWORD v = GetVersion(); 
  DWORD major = (DWORD)(LOBYTE(LOWORD(v))); 
  DWORD minor = (DWORD)(HIBYTE(LOWORD(v))); 
  DWORD build = 0;
  if (v < 0x80000000) build = (DWORD)(HIWORD(v)); 
 
  // 定义函数指针
  BOOL (__stdcall*GMSEx)(LPMEMORYSTATUSEX) = 0; 
 
  HINSTANCE hIL = LoadLibrary(L"kernel32.dll"); 
  GMSEx = (BOOL(__stdcall*)(LPMEMORYSTATUSEX))GetProcAddress(hIL, "GlobalMemoryStatusEx"); 
 
  if(GMSEx) { 
    MEMORYSTATUSEX m; 
    m.dwLength = sizeof(m); 
    if(GMSEx(&m)) { 
        ret = (int)(m.ullTotalPhys>>20); 
    } 
  } else { 
    MEMORYSTATUS m; 
    m.dwLength = sizeof(m); 
    GlobalMemoryStatus(&m); 
    ret = (int)(m.dwTotalPhys>>20); 
  } 
  return ret; 
}