(VC/MFC)禁止对话框(窗口)的大小改变和移动

一、禁止对话框的移动
(1)、第一种方法
为这个对话框添加系统消息过虑处理:
.h中:
...
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
...

.cpp中
BEGIN_MESSAGE_MAP(CXXXDlg, CDialog)
...
ON_WM_SYSCOMMAND()
...
END_MESSAGE_MAP()


void CXXXDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if (nID == SC_MOVE || nID==0xF012)
return;
else
CDialog::OnSysCommand(nID, lParam);
}

SC_MOVE就是0xF010。
参考帖子:http://topic.csdn.net/t/20020821/12/957952.html
(2)、第二种方法
.h中:
...
afx_msg UINT OnNcHitTest(CPoint point); 
...

.cpp中
BEGIN_MESSAGE_MAP(CXXXDlg, CDialog)
...
ON_WM_NCHITTEST() 
...
END_MESSAGE_MAP()


UINT CXXXDlg::OnNcHitTest(CPoint point)
{
      int ret = CDialog::OnNcHitTest(point);

      if( HTCAPTION == ret)
            return HTCLIENT;

      return ret;
}

二、禁止对话框改变大小
.h中:
...
afx_msg UINT OnNcHitTest(CPoint point); 
...

.cpp中
BEGIN_MESSAGE_MAP(CXXXDlg, CDialog)
...
ON_WM_NCHITTEST() 
...
END_MESSAGE_MAP()


UINT CXXXDlg::OnNcHitTest(CPoint point)
{
      int ret = CDialog::OnNcHitTest(point);

      //if语句的前两行是用来禁止改变大小的,最后一行是用来禁止移动的
      if(HTTOP == ret || HTBOTTOM == ret || HTLEFT == ret || HTRIGHT == ret
          || HTBOTTOMLEFT == ret || HTBOTTOMRIGHT == ret || HTTOPLEFT == ret || HTTOPRIGHT == ret             || HTCAPTION == ret)
            return HTCLIENT;

      return ret;
}

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