An application sends an EM_SCROLL message to vertically scroll a multiple-line edit control. This message is equivalent to sending a WM_VSCROLL message to the edit control.
This message is only processed by multiple-line edit controls.
wParam
Specifies the action the scroll-bar is to take. This parameter may be one of the following values:
| Value | Description |
| SB_LINEDOWN | Scroll one line down. |
| SB_LINEUP | Scroll one line up. |
| SB_PAGEDOWN | Scroll one page down. |
| SB_PAGEUP | Scroll one page up. |
lParam
This parameter is not used.
If the message is successful, the high-order word of the return value is TRUE and the low-order word is the number of lines that the command scrolls. The number returned may not be the same as the actual number of lines scrolled if the scrolling moves to the beginning or the end of the text. If an invalid command was passed in the wParam parameter, the return value is FALSE.
An application should use the EM_LINESCROLL message to scroll to a specific line or character position.
EM_LINESCROLL, WM_VSCROLL