subject_51248.htm

一些关于vc的问答

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序号：51248 发表者：Ollif 发表日期：2003-08-30 14:08:36
<br>主题：请问如何设置一个控件的前景和背景色？
<br>内容：比如控件的ID为IDC_STATIC，有没有这样的函数：<BR>GetCtrlDC(IDC_STATIC)<BR>多谢
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<font color=red>答案被接受</font><br>回复者：iamhere 回复日期：2003-08-31 00:35:50
<br>内容：在对话框中处理WM_CTLCOLOR消息<BR><BR>给你看看MSDN中的例子吧：<BR>// This OnCtlColor handler will change the color of a static control<BR>// with the ID of IDC_MYSTATIC. The code assumes that the CMyDialog<BR>// class has an initialized and created CBrush member named m_brush.<BR>// The control will be painted with red text and a background<BR>// color of m_brush.<BR><BR>HBRUSH CZilchDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) <BR>{<BR>&nbsp;&nbsp; // Call the base class implementation first! Otherwise, it may<BR>&nbsp;&nbsp; // undo what we're trying to accomplish here.<BR>&nbsp;&nbsp; HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);<BR><BR>&nbsp;&nbsp; // Are we painting the IDC_MYSTATIC control? We can use<BR>&nbsp;&nbsp; // CWnd::GetDlgCtrlID() to perform the most efficient test.<BR>&nbsp;&nbsp; if (pWnd-&gt;GetDlgCtrlID() == IDC_MYSTATIC)<BR>&nbsp;&nbsp; {<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// Set the text color to red<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pDC-&gt;SetTextColor(RGB(255, 0, 0));<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// Set the background mode for text to transparent <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// so background will show thru.<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pDC-&gt;SetBkMode(TRANSPARENT);<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// Return handle to our CBrush object<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;hbr = m_brush;<BR>&nbsp;&nbsp; }<BR><BR>&nbsp;&nbsp; return hbr;<BR>}<BR><BR>ps:奇怪，怎么有那么多人问这个问题啊？<BR><BR>
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