看來char*與char[]是兩種不同的字元串。廢話少說先上函數代碼：

void W2C(const wchar_t* pwstr,char* pcstr,size_t len)
{
 int nlength=wcslen(pwstr);
 unsigned int nbytes=WideCharToMultiByte(0,0,pwstr,nlength,NULL,0,NULL,NULL);
 if (nbytes>len)
  nbytes=len;
 WideCharToMultiByte(0,0,pwstr,nlength,pcstr,nbytes,NULL,NULL);
}
char* CStringToChar(CString* str)
{
 char* ch=0x00; //賦初值避免警告
 size_t len=str->GetLength();
 wchar_t* wch=str->GetBuffer();
 ch=new char[len+1];
 W2C(wch,ch,len);
 ch[len]='\0';
 return ch;
}

用法很簡單。

CString str=_T("dp=06DDRT&c=70");
char* ch=CStringToChar(&str);