int SetScrollPos(hWnd,nBar,nPos,bRedraw)
This function sets the current position of a scroll-bar thumb to that specified by the nPos parameter and, if specified, redraws the scroll bar to reflect the new position.
| Parameter | Type/Description |
| hWnd | HWND Identifies the window whose scroll bar is to be set. | ||
| nBar | int Specifies the scroll bar to be set. It can be one of the following values: | ||
| Value | Meaning | ||
| SB_CTL | Sets the position of a scroll-bar control. In this case, the hWnd parameter must be the handle of a scroll-bar control. | ||
| SB_HORZ | Sets a window's horizontal scroll-bar position. | ||
| SB_VERT | Sets a window's vertical scroll-bar position. | ||
| nPos | int Specifies the new position. It must be within the scrolling range. | ||
| bRedraw | BOOL Specifies whether the scroll bar should be redrawn to reflect the new position. If the bRedraw parameter is nonzero, the scroll bar is redrawn. If it is zero, it is not redrawn. | ||
The return value specifies the previous position of the scroll-bar thumb.
Setting the bRedraw parameter to zero is useful whenever the scroll bar will be redrawn by a subsequent call to another function.