subject_53490.htm

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序号：53490 发表者：郑中 发表日期：2003-09-19 23:01:02
<br>主题：请看看这代码！！错在哪里？？
<br>内容：////////////////////////////////////////////////////////////////////////////<BR>// CFontDlg message handlers<BR><BR>BOOL CFontDlg::OnInitDialog() <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CDialog::OnInitDialog();<BR>&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;// TODO: Add extra initialization here<BR>&nbsp;&nbsp;&nbsp;&nbsp;CenterWindow();<BR>&nbsp;&nbsp;&nbsp;&nbsp;CFontApp * app=(CFontApp *)AfxGetApp();<BR>&nbsp;&nbsp;&nbsp;&nbsp;CFont * font=app-&gt;GetCurrentFont();<BR>&nbsp;&nbsp;&nbsp;&nbsp;if(font==NULL) <BR>&nbsp;&nbsp;&nbsp;&nbsp;return TRUE;<BR>&nbsp;&nbsp;&nbsp;&nbsp;FARPROC proc=MakeProcInstance((FARPROC)SetFontProc,AfxGetInstanceHandle());<BR>&nbsp;&nbsp;&nbsp;&nbsp;EnumChildWindows(m_hWnd,(WNDENUMPROC)proc,(LPARAM)font-&gt;m_hObject);<BR>&nbsp;&nbsp;&nbsp;&nbsp;FreeProcInstance(proc);<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;return TRUE;&nbsp;&nbsp;// return TRUE unless you set the focus to a control<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// EXCEPTION: OCX Property Pages should return FALSE<BR>}<BR><BR>BOOL CFontDlg::SetFontProc(HWND hWnd, LPARAM lParam)<BR>{<BR>HFONT font=(HFONT)lParam;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;SendMessage(hWnd,WM_SETFONT,(WPARAM)font,<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(LPARAM)MAKELONG((WORD)TRUE,0));<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;return TRUE;<BR>}<BR><BR>提示错误：：<BR>FontDlg.cpp<BR>H:\study\Font\FontDlg.cpp(54) : error C2440: 'type cast' : cannot convert from '' to 'int (__stdcall *)(void)'<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;None of the functions with this name in scope match the target type<BR>H:\study\Font\FontDlg.cpp(67) : error C2660: 'SendMessageA' : function does not take 4 parameters<BR>Error executing cl.exe.<BR><BR>Font.exe - 2 error(s), 0 warning(s)<BR>第一个错误指---FARPROC proc=MakeProcInstance((FARPROC)SetFontProc,AfxGetInstanceHandle());
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<font color=red>答案被接受</font><br>回复者：iamhere 回复日期：2003-09-19 23:39:14
<br>内容：第一个Error表示要求SetFontProc这个函数或者为全局函数或者为类的静态函数<BR><BR>第二个Error是因为默认SendMessage作为CDialog的成员函数调用，而该成员函数只需三个参数。改为::SendMessage(hWnd,WM_SETFONT,(WPARAM)font,(LPARAM)MAKELONG((WORD)TRUE,0));<BR>
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回复者：郑中 回复日期：2003-09-20 00:05:11
<br>内容：谢谢你！！现在可以了！！但是你可不可以说详细点！！或者是有什么资料介绍！！回为我还是不明白为什么要这样改！？！谢谢！！
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