WINdows窗口的背景图片，有什么办法可以移动这个背景图片吗？

[fengshangren]

我看到一个C++写的程序，他只有一个窗口，图片就放在窗口背景图片上，但是他滚动条可以移动这个图片坐标。请问是怎么做到的。不用移动组件的办法来移动图片。只移动图片

[schlafenhamster]

CRect wrc;
GetWindowRect(wrc);
ScreenToClient(&wrc);
MapWindowPoints(pDlg,wrc);
SetBrushOrgEx(dc.m_hDC,-wrc.left,-wrc.top,0);

[fengshangren]

[quote=引用 2 楼 schlafenhamster 的回复:] // 初始化窗口大小结构 m_hDC = ::GetDC(m_hWnd); m_hMemDC = CreateCompatibleDC(m_hDC); m_hFullBitmap = CreateDIBSection(m_hDC, m_lpbmi, DIB_RGB_COLORS, &m_lpScreenDIB, NULL, NULL); SelectObject(m_hMemDC, m_hFullBitmap); SetScrollRange(SB_HORZ, 0, m_lpbmi->bmiHeader.biWidth); SetScrollRange(SB_VERT, 0, m_lpbmi->bmiHeader.biHeight); InitMMI(); SendNext(); return TRUE; // return TRUE unless you set the focus to a control // EXCEPTION: OCX Property Pages should return FALSE } void CScreenSpyDlg::ResetScreen() { UINT nBISize = m_pContext->m_DeCompressionBuffer.GetBufferLen() - 1; if (m_lpbmi != NULL) { int nOldWidth = m_lpbmi->bmiHeader.biWidth; int nOldHeight = m_lpbmi->bmiHeader.biHeight; delete[] m_lpbmi; delete[] m_lpbmi_rect; m_lpbmi = (BITMAPINFO *) new BYTE[nBISize]; m_lpbmi_rect = (BITMAPINFO *) new BYTE[nBISize]; memcpy(m_lpbmi, m_pContext->m_DeCompressionBuffer.GetBuffer(1), nBISize); memcpy(m_lpbmi_rect, m_pContext->m_DeCompressionBuffer.GetBuffer(1), nBISize); DeleteObject(m_hFullBitmap); m_hFullBitmap = CreateDIBSection(m_hDC, m_lpbmi, DIB_RGB_COLORS, &m_lpScreenDIB, NULL, NULL); SelectObject(m_hMemDC, m_hFullBitmap); memset(&m_MMI, 0, sizeof(MINMAXINFO)); InitMMI(); // 分辨率发生改变 if (nOldWidth != m_lpbmi->bmiHeader.biWidth || nOldHeight != m_lpbmi->bmiHeader.biHeight) { RECT rectClient, rectWindow; GetWindowRect(&rectWindow); GetClientRect(&rectClient); ClientToScreen(&rectClient); // 计算ClientRect与WindowRect的差距（标题栏，滚动条） rectWindow.right = m_lpbmi->bmiHeader.biWidth + rectClient.left + (rectWindow.right - rectClient.right); rectWindow.bottom = m_lpbmi->bmiHeader.biHeight + rectClient.top + (rectWindow.bottom - rectClient.bottom); MoveWindow(&rectWindow); } }

[fengshangren]

我看到一个源码他是这样写的，这是怎么搞的，能简单说一下吗

[Eleven]

https://www.codeproject.com/Articles/3175/Displaying-Bitmap-with-Scrolling

[zgl7903]

用 CScrollView Class 或者窗口添加相应的滚动处理

[CT8100]

重绘