mfc 使用jpg图片做对话框背景

void CDlgLogOn::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CDialogEx::OnPaint()

CString strPath;

strPath += "d:\\Res\\LOGPICTURE1.jpg";

CFile m_file(strPath,CFile::modeRead );
//获取文件长度
DWORD m_filelen = m_file.GetLength();
//在堆上分配空间
HGLOBAL m_hglobal = GlobalAlloc(GMEM_MOVEABLE,m_filelen);

LPVOID pvdata = NULL;
//锁定堆空间,获取指向堆空间的指针
pvdata = GlobalLock(m_hglobal);

//将文件数据读区到堆中
m_file.Read(pvdata,m_filelen);

IStream* m_stream;

GlobalUnlock(m_hglobal);

//在堆中创建流对象
CreateStreamOnHGlobal(m_hglobal,TRUE,&m_stream);

//利用流加载图像
OleLoadPicture(m_stream,m_filelen,TRUE,IID_IPicture,(LPVOID*)&m_picture);
m_stream->Release();

m_picture->get_Width(&m_width);// 宽高，MM_HIMETRIC 模式，单位是0.01毫米
m_picture->get_Height(&m_height);
m_IsShow = TRUE;
m_file.Close();

if (m_IsShow==TRUE)
{
CRect rect;
GetClientRect(rect);
int nW, nH;
nW = (int)(rect.Width());
nH = (int)(rect.Height());
m_picture->Render(dc,0,0,nW,nH,0,m_height,m_width,-m_height,&rect);
}

CDialogEx::OnPaint();
}

转自：http://blog.csdn.net/lili893628843/article/details/8200906?utm_source=jiancool