C++常用函数集锦

gistfile1.cpp

//强制置顶窗口
void ForceForegroundWindow(HWND hWnd) {
	DWORD thread1, thread2, pid;
	thread1 = ::GetWindowThreadProcessId(::GetForegroundWindow(), &pid);
	thread2 = ::GetCurrentThreadId();
	::AttachThreadInput(thread2, thread1, TRUE);
	::SetForegroundWindow(hWnd);
	::AttachThreadInput(thread2, thread1, FALSE);
	::BringWindowToTop(hWnd);
}

//将utf8转换为unicode
CString UTF8ToUnicode(const char* UTF8) {
	DWORD dwUnicodeLen; //转换后Unicode的长度
	TCHAR *pwText = NULL; //保存Unicode的指针
	CString strUnicode; //返回值
	//获得转换后的长度，并分配内存
	dwUnicodeLen = MultiByteToWideChar(CP_UTF8,0,UTF8,-1,NULL,0);
	pwText = new TCHAR[dwUnicodeLen];
	if (!pwText) {
		return strUnicode;
	}
	//转为Unicode
	MultiByteToWideChar(CP_UTF8,0,UTF8,-1,pwText,dwUnicodeLen);
	//转为CString
	strUnicode.Format(_T("%s"),pwText);
	//清除内存
	delete []pwText;
	//返回转换好的Unicode字串
	return strUnicode;
}

//将unicode转换为utf8
string UnicodeToUTF8(const CString &szContent) {
	DWORD dwSize;
	char *pRet = NULL;
	string szRet;
	//获得转换后所需空间
	dwSize = WideCharToMultiByte(CP_UTF8, 0, szContent, -1, NULL, 0, NULL, NULL);
	pRet = new char[dwSize];
	if (!pRet) return szRet;
	//转换
	WideCharToMultiByte(CP_UTF8, 0, szContent, -1, pRet, dwSize, NULL, NULL);
	//存到string
	szRet = pRet;
	delete []pRet;
	//返回
	return szRet;
}