| int GetScrollPos(hwnd, fnBar) | |||||
| HWND hwnd; | /* handle of window with scroll bar | */ | |||
| int fnBar; | /* scroll bar flags, */ | ||||
The GetScrollPos function retrieves the current position of the scroll box (thumb) of a scroll bar. The current position is a relative value that depends on the current scrolling range. For example, if the scrolling range is 0 through 100 and the scroll box is in the middle of the bar, the current position is 50.
hwnd
Identifies a window that has standard scroll bars or a scroll bar control, depending on the value of the fnBar parameter.
fnBar
Specifies the scroll bar to examine. It can be one of the following values:
| Value | Meaning |
| SB_CTL | Retrieves the position of a scroll bar control. In this case, the hwnd parameter must be the window handle of a scroll bar control. |
| SB_HORZ | Retrieves the position of a window's horizontal scroll bar. |
| SB_VERT | Retrieves the position of a window's vertical scroll bar. |
The return value specifies the current position of the scroll box in the scroll bar, if the function is successful. Otherwise, it is zero, indicating that the hwnd parameter is invalid or that the window does not have a scroll bar.