请问如何使图片动态适应picture控件的尺寸，谢谢

[lj1006]

之前有定义：HBITMAP m_hPhotoBitmap;
void CView0::DrawUserPhoto(int x, int y, CDC *pDC)
{
if(!m_hPhotoBitmap) return;

HBITMAP OldBitmap;

CWnd *pWnd = GetDlgItem(IDC_PICTURE);
CRect rect;
pWnd->GetClientRect(&rect);
pDC = pWnd->GetDC();

CDC MemDC;

MemDC.CreateCompatibleDC(pDC);
OldBitmap=(HBITMAP)MemDC.SelectObject(m_hPhotoBitmap);

pDC->BitBlt(x,y,rect.Width(),rect.Height(),&MemDC,0,0,SRCCOPY);
MemDC.SelectObject(OldBitmap);
}
void CView0::OnPaint()
{
CPaintDC dc(this); // device context for painting

if (IsIconic())
{
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
//dc.DrawIcon(x, y, m_hIcon);
}
else
{
CWnd *pWnd = GetDlgItem(IDC_PICTURE);
CRect rect;
pWnd->GetClientRect(&rect);
DrawUserPhoto(rect.left,rect.top,&dc);
CView::OnPaint();
}
}

这样写后，控件之外的图片就显示不全了，请问改怎么改啊，谢谢

[blwinner]

把bitblt换成strctchblt，这个函数会放大缩小图片自适应控件大小

[blwinner]

stretchblt

[ouyh12345]

StretchBlt

[na_he]

没错的，stretchblt

[lj1006]

请问stretchblt怎么用啊

[zjw6861982]

BOOL StretchBlt(int x, int y, int nWidth, int nHeight, CDC* pSrcDC,
		int xSrc, int ySrc, int nSrcWidth, int nSrcHeight, DWORD dwRop);

[lj1006]

请问在我的程序中如何使用StretchBlt呢，小弟初学不是很明白，谢谢

[lj1006]

哦，明白一些了，图片的高、宽如何得到啊

[lj1006]

StretchBlt中的 int nSrcWidth, int nSrcHeight如何得到啊

[izardMan]

CBitmap bitmap;
BITMAP bmp;
bitmap.attach(hbitmap);
bmp.GetBitmap(&bmp);
bmp.bmHeight;
bmp.bmWidth;

[lj1006]

error C2039: 'attach' : is not a member of 'CBitmap'怎么不对啊

[izardMan]

Attach