基于IPicture图片浏览,带滚动条的对话框

上传者: ygajl | 上传时间: 2022-10-18 10:18:46 | 文件大小: 1.51MB | 文件类型: ZIP
没有无用代码,每句代码都有意义,基于IPicture显示图片,效果高,并且兼顾了了闪烁和擦除背景。 switch (nSBCode) { case SB_THUMBTRACK: { nPostion = GetScrollPos (SB_VERT); ScrollWindow(0, nPostion - nPos); SetScrollPos (SB_VERT, nPos); } break; case SB_LINELEFT: { nPostion = GetScrollPos (SB_VERT); SetScrollPos (SB_VERT, nPostion - 1); if (nPostion != 0) ScrollWindow (0, 1); } break; case SB_LINERIGHT: { nPostion = GetScrollPos (SB_VERT); SetScrollPos (SB_VERT, nPostion + 1); if (nPostion + nThumbwidth < nMax) ScrollWindow (0, -1); } break; case SB_PAGELEFT: //在滚动块的上方空白滚动区域单击,增量为6 { SetScrollPos (SB_VERT, nPostion - 6); if (nPostion+nThumbwidth > 0) ScrollWindow (0, 6); } break; case SB_PAGERIGHT: //在滚动块的下方空白滚动区域单击,增量为6 { SetScrollPos (SB_VERT, nPostion + 6); if (nPostion+nThumbwidth < nMax) ScrollWindow (0, -6); } break; }

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