VC比例放大缩小

CRect rect;
::GetWindowRect(m_hWnd, rect);
ScreenToClient(rect);
m_nDlgWidth = rect.right - rect.left;
m_nDlgHeight = rect.bottom - rect.top;
//计算分辨率
m_nWidth = GetSystemMetrics(SM_CXSCREEN);
m_nHeight = GetSystemMetrics(SM_CYSCREEN);
//计算放大倍数
m_Multiple_width = float(m_nWidth)/float(m_nDlgWidth);
m_Multiple_height = float(m_nHeight)/float(m_nDlgHeight); change_flag = TRUE;//判断onSize执行时OnInitDlg是否已执行
MoveWindow(,,m_nWidth,m_nHeight, TRUE);

void CTDemoDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy); if (change_flag)
{ ReSize(IDC_BUTTON);
ReSize(IDOK);
ReSize(IDCANCEL);
//恢复放大倍数，并保存
m_Multiple_height = float()/m_Multiple_height;
m_Multiple_width = float()/m_Multiple_width;
}}void CTDemoDlg::ReSize(int nID)
{
CRect rect;
GetDlgItem(nID)->GetWindowRect(rect);
ScreenToClient(rect);
//计算控件左上角点
CPoint OldTLPoint, TLPoint;
OldTLPoint = rect.TopLeft();
TLPoint.x = long(OldTLPoint.x*m_Multiple_width);
TLPoint.y = long(OldTLPoint.y*m_Multiple_height);
//计算控件右下角点
CPoint OldBRPoint,BRPoint;
OldBRPoint = rect.BottomRight();
BRPoint.x = long(OldBRPoint.x*m_Multiple_width);
BRPoint.y = long(OldBRPoint.y*m_Multiple_height);
//移动控件到新矩形
rect.SetRect(TLPoint,BRPoint);
GetDlgItem(nID)->MoveWindow(rect, TRUE);
}