ON_WM_ACTIVATE()

最新推荐文章于 2023-12-27 22:03:44 发布

lizhaohu01

最新推荐文章于 2023-12-27 22:03:44 发布

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本文介绍了一个Windows应用程序如何处理窗口获得和失去焦点的消息。通过ON_WM_ACTIVATE()响应函数，可以根据不同情况（如激活方式和最小化状态）进行特定操作。

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.

C/C++ code

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