MFC 对话框加背景片

Question

怎样让对话框显示一张图片

Answer 1

BOOL CMyView::ShowBitmap(CString str)
{
   CBitmap *bitmap;
BITMAP  pBmpInfo;
HBITMAP bmp =(HBITMAP)::LoadImage(AfxGetInstanceHandle(),str,IMAGE_BITMAP,0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE);if(bmp==NULL)
{
MessageBox("LoadImage Error !");
return FALSE;
}bitmap=CBitmap::FromHandle(bmp);
bitmap->GetBitmap(&pBmpInfo);
CDC mem;
CDC *pDC=GetDC();
if(!mem.CreateCompatibleDC(pDC))
{
MessageBox("CreateCompatibleDC Error !");
return FALSE;
}if(! mem.SelectObject(bitmap))
{
MessageBox("SelectObject Error !");
return FALSE;
}
CRect rect;
GetClientRect(&rect);
// int err = pDC->BitBlt(0,0,pBmpInfo.bmWidth,pBmpInfo.bmHeight,&mem,0,0,SRCCOPY);
// int err = pDC->StretchBlt(0,0,pBmpInfo.bmWidth,pBmpInfo.bmHeight,&mem,0,0,rect.Width(),rect.Height(),SRCCOPY); 
        int err = pDC->StretchBlt(0,0,pBmpInfo.bmWidth,pBmpInfo.bmHeight,&mem,0,0,pBmpInfo.bmWidth,pBmpInfo.bmHeight,SRCCOPY); 
if(err==0)
{
MessageBox("BitBlt Error !");
return FALSE;
}
pDC->DeleteDC();
mem.DeleteDC();
                return TRUE;
}

Answer 2

OnPaint调用BitBlt、StretchBlt函数贴图

Answer 3

二楼，人家楼主是要在对话框上显示图片....CBitmap bmp;
CDC memdc;
memdc.CreateCompatibleDC(pDC);
CBitmap* pOldBitmap = memdc.SelectObject(&bmp);
bmp.LoadBitmap(IDB_BITMAP);
memdc.SelectObject(&bmp);
pDC->BitBlt(0,0,360,200,&memdc,0,0,SRCCOPY);
memdc.SelectObject(pOldBitmap);
bmp.DeleteObject();
memDC.DeleteDC();
以上代码应写在OnPaint函数中

Answer 4

将图片设置为背景。OnEraseBkgnd(CDC*   pDC)重写

Answer 5

不会把整个对话框加一张图吧！
void CVidiconSetTab::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
CRect rect;
GetClientRect(&rect);
CBitmap bmp;
bmp.LoadBitmap(IDB_ShowDlgBk);
CBrush brush;
brush.CreatePatternBrush(&bmp);
CBrush *pOldbrush = dc.SelectObject(&brush);
dc.Rectangle(0,0,rect.Width(),rect.Height());
dc.SelectObject(pOldbrush);
// 不为绘图消息调用 CDialog::OnPaint()
}也可以用下面这个方法;
先定义一个CBrush brush;//在.h文件里
在初始化对话框中
//加背景
CBitmap bmp;
bmp.LoadBitmap(IDB_ShowDlgBk);
brush.CreatePatternBrush(&bmp);
把OnCtlColor
ruturn hbr;改为：return brush;