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progc
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blx12.arj
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WINSB.CPP
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1991-05-02
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992b
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// winsb.cpp
#include<windows.h>
#include"winsb.h"
void WinScrollBar::ScrollProc(WORD wParam, LONG lParam)
{
switch(wParam)
{
case SB_LINEUP: // move up
curPosition -= numLineScroll;
break;
case SB_LINEDOWN: // move down
curPosition += numLineScroll;
break;
case SB_PAGEUP: // move up a 'page'
curPosition -= numPageScroll;
break;
case SB_PAGEDOWN: // move down a 'page'
curPosition += numPageScroll;
break;
case SB_TOP: // go to top
curPosition = minPosition;
break;
case SB_BOTTOM: // go to bottom
curPosition = maxPosition;
break;
case SB_THUMBPOSITION: // reset to new position
curPosition = LOWORD(lParam);
break;
}
curPosition = max(0, min(curPosition, maxPosition));
}