MFC让控件随窗口大小而改变

转载自http://blog.csdn.net/chw1989/article/details/7488711

大小和位置都改变(亲测可行)

1.首先为窗体类添加CRect m_rect，该成员变量用来记录窗体的当前大小。

2.在类向导里面（Ctrl+W），为窗体添加消息WM_SIZE的响应函数OnSize(）；

注意if(nType==1) return;这一句必须添加，否则最小化恢复的时候会出错

void CPaperManagementDlg::OnSize(UINT nType, int cx, int cy)   
{  
    CDialog::OnSize(nType, cx, cy);  
    if(nType==1) return;//最小化则什么都不做  
    // TODO: Add your message handler code here  
    CWnd *pWnd;   
    pWnd = GetDlgItem(IDC_STATIC);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_FILE_TREE);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_EDIT_NAME);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_EDIT_REFERENCE);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_EDIT_SUMMARY);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_EDIT_REMARK);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_BUTTON_UPDATE);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_BUTTON_SAVE);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_STATIC_1);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_STATIC_2);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_STATIC_3);  
    ChangeSize(pWnd, cx, cy);  
    pWnd = GetDlgItem(IDC_STATIC_4);  
    ChangeSize(pWnd, cx, cy);  
    GetClientRect(&m_rect);// 将变化后的对话框大小设为旧大小     
}  

changesize是自己添加的函数

void CPaperManagementDlg::ChangeSize(CWnd *pWnd, int cx, int cy)
{
    if(pWnd)  //判断是否为空，因为对话框创建时会调用此函数，而当时控件还未创建	
	{
		CRect rect;   //获取控件变化前的大小  
		pWnd->GetWindowRect(&rect);
		ScreenToClient(&rect);//将控件大小转换为在对话框中的区域坐标

		//    cx/m_rect.Width()为对话框在横向的变化比例
		rect.left=rect.left*cx/m_rect.Width();//调整控件大小
		rect.right=rect.right*cx/m_rect.Width();
		rect.top=rect.top*cy/m_rect.Height();
		rect.bottom=rect.bottom*cy/m_rect.Height();
		pWnd->MoveWindow(rect);//设置控件大小
	}
}