MFC中OnActivate函数解析

失去焦点和得到焦点响应的是：ON_WM_ACTIVATE()
对应的处理是：afx_msg void OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized);

nState有三种状态:
WA_INACTIVE The window is being deactivated.
WA_ACTIVE The window is being activated through some method other than a mouse click (for example, by use of the keyboard interface to select the window).
WA_CLICKACTIVE The window is being activated by a mouse click.
当窗口得到或失去焦点时,会触发这个消息.
我们接收到这个消息后,可以判断到底是哪一种状态.

void CXXXDlg::OnActivate( UINT nState, CWnd* pWndOther, BOOL bMinimized )  
{  
 CDialog::OnActivate(nState, pWndOther, bMinimized);  
  if (WA_ACTIVE == nState)  
  {
    ......
  }
  else if (WA_INACTIVE == nState) 
  {
    ......
  }
  else
  {
    ......
  }
}

原文链接：http://blog.csdn.net/xiashengfu/article/details/7938084