将图象列表转换成设备无关位图

1、将图象列表转换成设备无关位图 在我的PrintTree例子中，我想打印彩色的树控制.对于文本很容易，但是图标就不简单了.我试着将图象列表转换成DIB,但是我真正需要的是一个方法，能够取出一个ICON的DIB，而不是整个图象列表。下面就是我使用的具体方法：HANDLE CAdvancedTreeCtrl:ImageToDIB( CImageList* pImageList, int iImageNumber, CWnd* pWnd, BOOL bOverlay, HTREEITEM actualItem ) / Local Variables CBitmap bitmap; CWindowDCd

2、c( pWnd ); CDC memDC; CRectrect; CPalette pal; IMAGEINFO imageInfo; if( FALSE = pImageList->GetImageInfo( iImageNumber, &imageInfo ) ) / Getting of the Imageinfos failed return NULL; / Create compatible stuff and select Bitmap if( FALSE = memDC.CreateCompatibleDC( &dc ) ) / Create failed

3、return NULL; if( FALSE = bitmap.CreateCompatibleBitmap( &dc, imageInfo.rcImage.bottom-imageInfo.rcImage.top, imageInfo.rcImage.right-imageInfo.rcImage.left ) ) / Create failed return NULL; CBitmap* pOldBitmap = memDC.SelectObject( &bitmap ); if( NULL = pOldBitmap ) / Select failed return NUL

4、L; / Local Variables for Draw CPoint point( 0, 0); UINT nStyle = ILD_NORMAL; / Is there an Overlay if( TRUE = bOverlay ) TV_ITEM tv_item; / Set up the Item-Struct tv_item.hItem = actualItem; / Get the full Item-Struct GetItem( &tv_item ); / Set the wanted style nStyle = ILD_TRANSPARENT|( tv_item

5、.state & TVIS_OVERLAYMASK ); / Draw Image to the compatible DC if( FALSE = pImageList->Draw( &memDC, iImageNumber, point, nStyle ) ) / Drawing of the Image failed return NULL; / Create logical palette if device support a palette if( dc.GetDeviceCaps( RASTERCAPS ) & RC_PALETTE ) UINT n

6、Size = sizeof(LOGPALETTE) + ( sizeof(PALETTEENTRY) * 256 );LOGPALETTE* pLP = (LOGPALETTE*)new BYTEnSize;pLP->palVersion = 0x300;pLP->palNumEntries = (unsigned short)GetSystemPaletteEntries( dc, 0, 255, pLP->palPalEntry );/ Create the palettepal.CreatePalette( pLP );/ Free memorydelete pLP; memDC.SelectO