C++ MessageBox()

关于MessageBox function，参考：https://msdn.microsoft.com/en-us/library/ms645505(VS.85).aspx

更多示例，参考Using Dialog Boxes（https://msdn.microsoft.com/en-us/library/ms644996(v=vs.85).aspx#message_box）

IDE: Code::Blocks 16.01

操作系统：Windows 7 x64

#include <windows.h>
#include <tchar.h>

/* In the following example, the application displays a message box
   that prompts the user for an action after an error condition has occurred.
   The message box displays the message that describes the error condition
   and how to resolve it.
   The MB_YESNO style directs MessageBox to provide two buttons
   with which the user can choose how to proceed : */
int DisplayConfirmSaveAsMessageBox()
{
    int msgboxID = MessageBox(
        NULL,
        "temp.txt already exists.
Do you want to replace it?",
        "Confirm Save As",
        MB_ICONEXCLAMATION | MB_YESNO
    );

    if (msgboxID == IDYES)
    {
        // TODO: add code
    }

    return msgboxID;
}

int _cdecl _tmain()
{
    DisplayConfirmSaveAsMessageBox();

    return 0;
}

在Code::Blocks 16.01中的运行结果：

IDE: Microsoft Visual Studio Community 2017 15.5.2

操作系统：Windows 7 x64

#include "stdafx.h"

#include <windows.h>

/* In the following example, the application displays a message box 
   that prompts the user for an action after an error condition has occurred.
   The message box displays the message that describes the error condition 
   and how to resolve it.
   The MB_YESNO style directs MessageBox to provide two buttons 
   with which the user can choose how to proceed : */
int DisplayConfirmSaveAsMessageBox()
{
    int msgboxID = MessageBox(
        NULL,
        L"temp.txt already exists.
Do you want to replace it?",
        L"Confirm Save As",
        MB_ICONEXCLAMATION | MB_YESNO
    );

    if (msgboxID == IDYES)
    {
        // TODO: add code
    }

    return msgboxID;
}

int _cdecl _tmain()
{
    DisplayConfirmSaveAsMessageBox();

    return 0;
}

在Microsoft Visual Studio Community 2017 15.5.2中的运行结果：

---

 关于MessageBox()的参数：

第一个，不太理解。

第二个，指定要显示的文本信息。

第三个，指定消息框的标题。

第四个，指定图标，及按键等等。