C / C++ / MFC

// Use a constructor to initialize the string
std::string *text;
text = new std::string("Assigned Text");

// Use the assignment operator to initialize the string
std::string *text;
text = new std::string();
*text = "Assigned Text";

// Use a constructor to initialize a string on the stack
std::string text("Assigned Text");

// Use the assignment operator to initialize a string object
std::string text;
text = "Assigned Text";

Mark Salsbery
Microsoft MVP - Visual C++

#include "atlconv.h"

// function to convert wide string to string.
string* WstringToString( wstring& WideString )
{
    // Allocate the string.
    string* pString = new string;
    
    {
        USES_CONVERSION;
        
        // converted string.
        *pString = W2A( WideString.c_str());
    }
    
    return pString;
}

// Your main function.
void ConversionFunction() 
{
    // The wide string.
    wstring WideString = L"Hello";
    string* pString = WstringToString( WideString );

    // after usage, delete the allocated string.
    delete pString;
}

Maximilien wrote:

Not urgent.

Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_

<br />
error C2065: 'TTS_BALLOON' : undeclared identifier

<br />
#define   TTS_BALLOON   0x40

DWORD dwToolStyle = WS_EX_TOOLWINDOW | WS_EX_TOPMOST |WS_EX_WINDOWEDGE;
m_hwndTooltip = ::CreateWindowEx(dwToolStyle, TOOLTIPS_CLASS, NULL,
	WS_POPUP | TTS_ALWAYSTIP | TTS_NOPREFIX | TTS_BALLOON,
	CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
	this->GetSafeHwnd(), NULL, ::AfxGetResourceHandle(), NULL);
ASSERT(m_hwndTooltip);

::SendMessage(m_hwndTooltip, TTM_ACTIVATE, (WPARAM)TRUE, NULL);
::SendMessage(m_hwndTooltip, TTM_SETDELAYTIME, TTDT_INITIAL, MAKELONG(1000, 0));
::SendMessage(m_hwndTooltip, TTM_SETDELAYTIME, TTDT_AUTOPOP, MAKELONG(1000, 0));
::SendMessage(m_hwndTooltip, TTM_SETDELAYTIME, TTDT_RESHOW, MAKELONG(1000, 0));

TOOLINFO info = {0};
info.cbSize = sizeof(TOOLINFO);
info.uFlags = TTF_CENTERTIP | TTF_IDISHWND | TTF_SUBCLASS;
info.hwnd = this->GetSafeHwnd();
info.uId = (UINT)::GetDlgItem(this->GetSafeHwnd(), IDC_APPLE);	//给IDC_APPLE添加tooltips
info.rect = CRect(0, 0, 0, 0);
info.hinst = ::AfxGetResourceHandle();
info.lpszText = _T("You can check this to see\n\n\nwhat is this"); //<font color="blue">I wanna multi-lines effection, but doesn't work, please help me!</font>
if ( !::SendMessage(m_hwndTooltip, TTM_ADDTOOL, NULL, (LPARAM)&info) )
{
	::AfxMessageBox("Add tool fail");
}