subject_36598.htm

vc

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序号：36598 发表者：dayong 发表日期：2003-04-17 00:24:10
<br>主题：MessageBox用的时候有什么讲究吗？
<br>内容：我在按钮的处理函数里调用很正常，在自定义的一个类的成员函数里调要就出错：function does not take 3 parameters
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<font color=red>答案被接受</font><br>回复者：neilgan 回复日期：2003-04-17 00:28:27
<br>内容：In the classes derived from CWnd, You actually call a member function when you call MessageBox.<BR>pCWnd-&gt;MessageBox(Arg01,Arg02,Arg03) is actually ::MessageBox(pCWnd-&gt;m_pWnd,Arg01,Arg02,Arg03)<BR><BR>you should use MessageBox(NULL,Message,Title,Flags) in your own class.<BR>
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回复者：理文 回复日期：2003-04-18 10:04:04
<br>内容：在view类的类里可用MessageBox,在别的地方你可用AfxMessageBox。
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回复者：罗兹维尔 回复日期：2003-04-18 10:46:54
<br>内容：CWnd::MessageBox<BR>Creates and displays a window that contains an application-supplied message and caption, plus a combination of the predefined icons and pushbuttons described in the Message-Box Styles list.<BR><BR>int MessageBox(<BR>&nbsp;&nbsp; LPCTSTR lpszText,<BR>&nbsp;&nbsp; LPCTSTR lpszCaption = NULL,<BR>&nbsp;&nbsp; UINT nType = MB_OK <BR>);<BR>Parameters<BR>lpszText <BR>Points to a CString object or null-terminated string containing the message to be displayed. <BR>lpszCaption <BR>Points to a CString object or null-terminated string to be used for the message-box caption. If lpszCaption is NULL, the default caption "Error" is used. <BR>nType <BR>Specifies the contents and behavior of the message box. <BR>Return Value<BR>Specifies the outcome of the function. It is 0 if there is not enough memory to create the message box.<BR><BR>Remarks<BR>Use the global function AfxMessageBox instead of this member function to implement a message box in your application.<BR><BR>可见MessageBox是CWnd的成员函数，而CView是继承于CWnd的，所以可以直接用，而在其他类里就不行了，要用全局函数AfxMessageBox
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