void CWallDlg::show(int x,int y)
{//x,y,分别为输出的X和Y座标,利用StretchBlt()来作图
if(!m_hBitmap)
return;
CBitmap m_bmp;
m_bmp.Attach(m_hBitmap);
BITMAP bm;
m_bmp.GetObject(sizeof(BITMAP),&bm);
CDC* pDC=GetDC();
CRect rc;
int nWidth,nHeight,nX=0,nY=0;
nWidth=bm.bmWidth;
nHeight=bm.bmHeight;
CDC dcMem;//创建内存设备环境
dcMem.CreateCompatibleDC(pDC);
CBitmap* pOldbmp=dcMem.SelectObject(&m_bmp);//选入内存设备环境
pDC->StretchBlt(x,y,30,30,&dcMem,0,0,nWidth,nHeight,SRCCOPY);
dcMem.SelectObject(pOldbmp);//恢复原来的内存设备环境
}

我把它CBitmap m_bmp定义在类中;
把这个m_bmp.Attach(m_hBitmap);放在初始化中
结果也可输出了多个图了

线程不会用呀~~~~~~~~~~

新的方法是把图放到资源中

void CWallDlg::OnButton1()
{
// TODO: Add your control notification handler code here
CDC* pDC = this->GetDC();
CBitmap bitmap;
CDC dcMemory;
bitmap.LoadBitmap(IDB_BITMAP1);//图的ID号
dcMemory.CreateCompatibleDC(pDC);
dcMemory.SelectObject(&bitmap);
for(int i=0;i<10;i++)
{
pDC->BitBlt(30*i,0,30,30,&dcMemory,0,0,SRCCOPY);
}
}