subject_20493.htm

一些关于vc的问答

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序号：20493 发表者：A-bird 发表日期：2002-11-07 09:15:50
<br>主题：如何在对话框中显示控件(直接用代码写的)!!!
<br>内容：比说我要在一个指定的位置显示一个EDIT框,<BR>代码应该怎么写,写在哪里?<BR>其它控件是否也一样?<BR>求教!!!!!!!!!!!!!!!!!!!!
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<font color=red>答案被接受</font><br>回复者：口水龙 回复日期：2002-11-07 09:19:03
<br>内容：CEdit::Create <BR>BOOL Create( DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID );<BR><BR>Return Value<BR><BR>Nonzero if initialization is successful; otherwise 0.<BR><BR>Parameters<BR><BR>dwStyle<BR><BR>Specifies the edit control’s style. Apply any combination of edit styles to the control.&nbsp;&nbsp;<BR><BR>rect<BR><BR>Specifies the edit control’s size and position. Can be a CRect object or RECT structure.<BR><BR>pParentWnd<BR><BR>Specifies the edit control’s parent window (usually a CDialog). It must not be NULL.<BR><BR>nID<BR><BR>Specifies the edit control’s ID.<BR><BR>Remarks<BR><BR>You construct a CEdit object in two steps. First, call the CEdit constructor, then call Create, which creates the Windows edit control and attaches it to the CEdit object. <BR><BR>When Create executes, Windows sends theWM_NCCREATE,WM_NCCALCSIZE,WM_CREATE, andWM_GETMINMAXINFO messages to the edit control. <BR><BR>These messages are handled by default by the OnNcCreate, OnNcCalcSize, OnCreate, and OnGetMinMaxInfo member functions in the CWnd base class. To extend the default message handling, derive a class from CEdit, add a message map to the new class, and override the above message-handler member functions. Override OnCreate, for example, to perform needed initialization for the new class.<BR><BR>Apply the following window styles to an edit control.&nbsp;&nbsp;<BR><BR>WS_CHILD&nbsp;&nbsp; Always<BR><BR><BR>WS_VISIBLE&nbsp;&nbsp; Usually<BR><BR><BR>WS_DISABLED&nbsp;&nbsp; Rarely<BR><BR><BR>WS_GROUP&nbsp;&nbsp; To group controls<BR><BR><BR>WS_TABSTOP&nbsp;&nbsp; To include edit control in the tabbing order <BR>Example<BR><BR>void CMyView::OnInitialUpdate() <BR>{<BR>&nbsp;&nbsp; CView::OnInitialUpdate();<BR>&nbsp;&nbsp; <BR>&nbsp;&nbsp; // dynamically create an edit control on the view<BR>&nbsp;&nbsp; CEdit* pEdit = new CEdit;<BR>&nbsp;&nbsp; pEdit-&gt;Create(ES_MULTILINE | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_BORDER,<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CRect(10, 10, 100, 100), this, 1);<BR>}<BR><BR>CEdit Overview |&nbsp;&nbsp;Class Members |&nbsp;&nbsp;Hierarchy Chart<BR><BR>See Also&nbsp;&nbsp; CEdit::CEdit<BR><BR><BR>--------------------------------------------------------------------------------<BR>Send feedback to MSDN.Look here for MSDN Online resources. <BR>然后要对窗口进行UpdateWindow()就能显示出来了
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回复者：月光 回复日期：2002-11-07 09:38:31
<br>内容：在OnInitDialog()中<BR>BOOL CMyDlg::OnInitDialog() <BR>{<BR>&nbsp;&nbsp; CDialog::OnInitDialog();<BR>&nbsp;&nbsp; /////////////////////////////////<BR>&nbsp;&nbsp; CRect rect1(40,26,0,0);<BR><BR>&nbsp;&nbsp; CEdit *m_pEditName=new CEdit;<BR>&nbsp;&nbsp; m_pEditName-&gt;Create(WS_CHILDWINDOW|ES_AUTOHSCROLL,rect1,<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this,IDC_EDIT_NAME);<BR>&nbsp;&nbsp; ::SetWindowLong(m_pEditName-&gt;GetSafeHwnd(), GWL_EXSTYLE,WS_EX_CLIENTEDGE);<BR>&nbsp;&nbsp; ::SetWindowPos(m_pEditName-&gt;GetSafeHwnd(), NULL,&nbsp;&nbsp;0 ,0 ,200,18,SWP_SHOWWINDOW);<BR>///////////////////////////////////////////<BR>}
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