MFC 實現對話框最大化

1 對話框的屬性

Maximize Box 設爲true

2 類嚮導加入OnSize()函數

3 對話框的.h文件中添加變量 POINT oSize;

修改OnSize函數：

void XXDlg::OnSize(UINT nType, int cx, int cy)
{
	CDialogEx::OnSize(nType, cx, cy);
	if (cx <= 1 || cy <= 1 ) 
		return;

	//resize();
	if(nType == SIZE_RESTORED||nType == SIZE_MAXIMIZED)
	{


		float   ratio[2];  
		POINT   newDialogSize;  
		CRect   newRect;  

		//獲取新的客戶區的大小  
		GetClientRect(&newRect);  
		newDialogSize.x = newRect.right - newRect.left;  
		newDialogSize.y = newRect.bottom - newRect.top;  

		//得現在的對話框與以往對話框的大小比例  
		ratio[0]    = (float)newDialogSize.x / oSize.x;  
		ratio[1]    = (float)newDialogSize.y / oSize.y;  

		CRect Rect;  
		int woc;  

		//左右上角的數據  
		CPoint OldTLPoint, NewTLPint;  
		CPoint OldBRPoint, NewBRPint;  

		//列出所有控件  
		HWND  hwndChild = ::GetWindow(m_hWnd,GW_CHILD);  

		while(hwndChild)  
		{  
			//取得ID  
			woc  = ::GetDlgCtrlID(hwndChild);  
			GetDlgItem(woc)->GetWindowRect(Rect);  
			ScreenToClient(Rect);  

			OldTLPoint = Rect.TopLeft();  
			NewTLPint.x  = long(OldTLPoint.x*ratio[0]);  
			NewTLPint.y  = long(OldTLPoint.y*ratio[1]);  

			OldBRPoint   = Rect.BottomRight();  
			NewBRPint.x  = long(OldBRPoint.x*ratio[0]);  
			NewBRPint.y  = long(OldBRPoint.y*ratio[1]);  

			Rect.SetRect(NewTLPint,NewBRPint);  
			GetDlgItem(woc)->MoveWindow(Rect,TRUE);  
			hwndChild=::GetWindow(hwndChild, GW_HWNDNEXT);  
		}  
		oSize   = newDialogSize;      
	}

}