MFC程序对话框自适应分辨率全屏，控件跟随自动改变位置及大小

首先在OnInitDialog()中先hu获取到程序正常坐标，其中old应在头文件中声明：POINT old;

//保留未自适应分辨率时的应用大小
CRect rect;
GetClientRect(&rect);     
old.x = rect.right - rect.left;
old.y = rect.bottom - rect.top;

保存程序正常坐标后使主对话框全屏：

//程序自适应全屏
	if (1)
	{
		WINDOWPLACEMENT m_struOldWndpl;
		//get current system resolution
		int g_iCurScreenWidth = GetSystemMetrics(SM_CXSCREEN);
		int g_iCurScreenHeight = GetSystemMetrics(SM_CYSCREEN);

		//for full screen while backplay
		GetWindowPlacement(&m_struOldWndpl);

		CRect rectWholeDlg;//entire client(including title bar)
		CRect rectClient;//client area(not including title bar)
		CRect rectFullScreen;
		GetWindowRect(&rectWholeDlg);
		RepositionBars(0, 0xffff, AFX_IDW_PANE_FIRST, reposQuery, &rectClient);
		ClientToScreen(&rectClient);

		rectFullScreen.left = rectWholeDlg.left - rectClient.left;
		rectFullScreen.top = rectWholeDlg.top - rectClient.top;
		rectFullScreen.right = rectWholeDlg.right + g_iCurScreenWidth - rectClient.right;
		rectFullScreen.bottom = rectWholeDlg.bottom + g_iCurScreenHeight - rectClient.bottom;
		//enter into full screen;
		WINDOWPLACEMENT struWndpl;
		struWndpl.length = sizeof(WINDOWPLACEMENT);
		struWndpl.flags = 0;
		struWndpl.showCmd = SW_SHOWNORMAL;
		struWndpl.rcNormalPosition = rectFullScreen;
		SetWindowPlacement(&struWndpl);
	}

随后添加OnSize()函数，使对话框中的控件也自适应：

void CBNSREDDlg::OnSize(UINT nType, int cx, int cy)
{
	CDialogEx::OnSize(nType, cx, cy);
	//控件随程序自适应全屏后更改位置及大小
	if (1)
	{
		float fsp[2];
		POINT Newp; //获取现在对话框的大小
		CRect recta;
		GetClientRect(&recta);     //取客户区大小  
		Newp.x = recta.right - recta.left;
		Newp.y = recta.bottom - recta.top;
		fsp[0] = (float)Newp.x / old.x;
		fsp[1] = (float)Newp.y / old.y;
		CRect Rect;
		int woc;
		CPoint OldTLPoint, TLPoint; //左上角
		CPoint OldBRPoint, BRPoint; //右下角
		HWND  hwndChild = ::GetWindow(m_hWnd, GW_CHILD);  //列出所有控件  
		while (hwndChild)
		{
			woc = ::GetDlgCtrlID(hwndChild);//取得ID
			GetDlgItem(woc)->GetWindowRect(Rect);
			ScreenToClient(Rect);
			OldTLPoint = Rect.TopLeft();
			TLPoint.x = long(OldTLPoint.x*fsp[0]);
			TLPoint.y = long(OldTLPoint.y*fsp[1]);
			OldBRPoint = Rect.BottomRight();
			BRPoint.x = long(OldBRPoint.x *fsp[0]);
			BRPoint.y = long(OldBRPoint.y *fsp[1]);
			Rect.SetRect(TLPoint, BRPoint);
			GetDlgItem(woc)->MoveWindow(Rect, TRUE);
			hwndChild = ::GetWindow(hwndChild, GW_HWNDNEXT);
		}
		old = Newp;
	}
}

OK，完事！