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EM_SCROLL Overview  Group

An application sends an EM_SCROLL message to scroll the text vertically in a multiline edit control. This message is equivalent to sending a WM_VSCROLL message to the edit control.

EM_SCROLL 

wParam = (WPARAM) (INT) nScroll;    // scroll action 

lParam = 0;                         // not used; must be zero 

 

Parameters

nScroll
Value of wParam. Specifies the action the scroll bar is to take. This parameter may be one of the following values:

Value

Meaning

SB_LINEDOWN

Scrolls down one line.

SB_LINEUP

Scrolls up one line.

SB_PAGEDOWN

Scrolls down one page.

SB_PAGEUP

Scrolls up one page.

Return Values

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 the nScroll parameter specifies an invalid value, the return value is FALSE.

Remarks

An application should use the EM_LINESCROLL message to scroll to a specific line or character position.

An application should use the EM_SCROLLCARET message to scroll the caret into view.

See Also

EM_LINESCROLL, EM_SCROLLCARET, WM_VSCROLL 

See also:


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