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");
}

Nandu_77b wrote:

We have distributed our DLL with .lib and .h files. He reports that when he includes our .h file in his program, it is not compiling (compile or link errors). He is tell this is boz because it has multiply defines. Is there any way to avoide this?