在BCB中这段代码为什么出错呢？(30分)

void __stdcall EnumGroup(TCHAR* pszServerName)
{
...
NET_API_STATUS nStatus;
DWORD dwLevel = 1;
PLOCALGROUP_INFO_1 pBuf = NULL;
DWORD Read=0, Entry=0, Resume=0;
nStatus = NetLocalGroupEnum(pszServerName, dwLevel, (LPBYTE*)&pBuf,
MAX_PREFERRED_LENGTH, &Read, &Entry, &Resume);
...
提示
[C++ Error] main.cpp(28): E2034 Cannot convert 'char *' to 'const wchar_t *'
[C++ Error] main.cpp(28): E2342 Type mismatch in parameter 'servername' (wanted 'const wchar_t *', got 'char *')

??