EM_LINESCROLL  T7_0J1 

An application sends an EM_LINESCROLL message to scroll the text vertically or horizontally in a multiline edit control.

EM_LINESCROLL

wParam = (WPARAM) cxScroll; // characters to scroll horizontally

lParam = (LPARAM) cyScroll; // lines to scroll vertically

Parameters

cxScroll

Value of wParam. Specifies the number of characters to scroll horizontally.

cyScroll

Value of lParam. Specifies the number of lines to scroll vertically.

Return Values

If the message is sent to a multiline edit control, the return value is TRUE; if the message is sent to a single-line edit control, the return value is FALSE.

Remarks

The edit control does not scroll vertically past the last line of text in the edit control. If the current line plus the number of lines specified by the cyScroll parameter exceeds the total number of lines in the edit control, the value is adjusted so that the last line of the edit control is scrolled to the top of the edit-control window.

The EM_LINESCROLL message can be used to scroll horizontally past the last character of any line.