This message copies a line from the edit control.
The EM_GETLINE message may be used as either a wide-character message (where text arguments must use Unicode) or an ANSI message (where text arguments must use characters from the Windows 3.x character set installed).
wParam
Specifies the line number of the line in the control, where the line number of the first line is zero.
lParam
Points to the buffer where the line will be stored. The first word of the buffer specifies the maximum number of characters to be copied to the buffer. The copied line is not null-terminated.
The return value is the number of characters actually copied. This message is not processed by single-line edit controls.