createsolidbrush_screentoclient_getitemrect

例如这段代码：

CString path;

path = L"D:\\1.jpg";

CImage img;

HRESULT hr = img.Load(path);

CRect rect;

int cx = img.GetWidth();

int cy = img.GetHeight();

GetDlgItem(IDC_PIC)->GetWindowRect(rect);

ScreenToClient(&rect);

GetDlgItem(IDC_PIC)->MoveWindow(rect.left,rect.top,cx,cy,TRUE);

CWnd *pWnd = GetDlgItem(IDC_PIC);

pWnd->GetClientRect(&rect);

CDC *pDC = pWnd->GetDC();

img.Draw(pDC->m_hDC,rect);

ReleaseDC(pDC);

为什么：

GetDlgItem(IDC_PIC)->GetWindowRect(rect);

ScreenToClient(&rect);

不能写成GetDlgItem(IDC_PIC)->GetClientRect(rect); ？

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