EditControlMessages Enumeration

An application sends the Null message if it wants to send a message that the recipient window will ignore.

wParam The starting character position of the selection

lParam The ending character position of the selection

This message is equivalent to sending a WM_VScroll message to the edit control.

You can send this message to either an edit control or a rich edit control.

wParam The action the scroll bar is to take.

lParam This parameter is not used.

wParam Edit controls: The number of characters to scroll horizontally.

Rich edit controls: This parameter is not used; it must be zero.

lParam The number of lines to scroll.

You can send this message to either an edit control or a rich edit control.

wParam This parameter is reserved. It should be set to zero.

lParam This parameter is reserved. It should be set to zero.

You can send this message to either an edit control or a rich edit control.

wParam Not used; must be zero

lParam Not used; must be zero

A character index is the zero-based index of the character from the beginning of the edit control.

You can send this message to either an edit control or a rich edit control.

wParam The zero-based line number.

A value of –1 specifies the current line number (the line that contains the caret).

lParam This parameter is not used.

You can send this message to either an edit control or a rich edit control.

wParam The character index of a character in the line whose length is to be retrieved.

If this parameter is greater than the number of characters in the control, the return value is zero.

This parameter can be –1. In this case, the message returns the number of unselected characters on lines containing selected characters.

For example, if the selection extended from the fourth character of one line through the eighth character from the end of the next line, the return value would be 10 (three characters on the first line and seven on the next).

lParam This parameter is not used.

wParam Specifies whether the replacement operation can be undone.

If this is , the operation can be undone. If this is , the operation cannot be undone.

lParam A pointer to a null-terminated string containing the replacement text.

You can send this message to either an edit control or a rich edit control.

wParam The zero-based index of the line to retrieve from a multiline edit control.

A value of zero specifies the topmost line.

This parameter is ignored by a single-line edit control.

lParam A pointer to the buffer that receives a copy of the line.

Before sending the message, set the first word of this buffer to the size, in TCHARs, of the buffer.

For ANSI text, this is the number of bytes; for Unicode text, this is the number of characters.

The size in the first word is overwritten by the copied line.

The text limit is the maximum amount of text, in TCHARs, that the user can type into the edit control.

You can send this message to either an edit control or a rich edit control.

wParam The maximum number of TCHARs the user can enter.

For ANSI text, this is the number of bytes; for Unicode text, this is the number of characters.

This number does not include the terminating null character.

Rich edit controls: If this parameter is zero, the text length is set to 64,000 characters

If this parameter is zero, the text length is set to 0x7FFFFFFE characters for single-line edit controls or -1 for multiline edit controls.

lParam This parameter is not used.

You can send this message to either an edit control or a rich edit control.

wParam Not used; must be zero

lParam Not used; must be zero

You can send this message to either an edit control or a rich edit control

wParam Not used; must be zero

lParam Not used; must be zero

A character index is the zero-based index of the character from the beginning of the edit control.

You can send this message to either an edit control or a rich edit control.

wParam The character index of the character contained in the line whose number is to be retrieved.

If this parameter is –1, LineFromChar retrieves either the line number of the current line (the line containing the caret) or, if there is a selection, the line number of the line containing the beginning of the selection

lParam This parameter is not used.

The undo flag is set whenever an operation within the edit control can be undone.

You can send this message to either an edit control or a rich edit control.

wParam Not used; must be zero

lParam Not used; must be zero

You can send this message to either an edit control or a rich edit control.

wParam Specifies whether to set or remove the ES_READONLY style.

A value of sets the ES_READONLY style; a value of removes the ES_READONLY style.

lParam This parameter is not used.

The message redraws the control to reflect the new margins.

You can send this message to either an edit control or a rich edit control

wParam The margins to set.

lParam The LOWORD specifies the new width of the left margin, in pixels. This value is ignored if wParam does not include EC_LEFTMARGIN

The HIWORD specifies the new width of the right margin, in pixels. This value is ignored if wParam does not include EC_RIGHTMARGIN

You can send this message to either an edit control or a rich edit control.

wParam Not used; must be zero

lParam Not used; must be zero

You can send this message to either an edit control or a rich edit control.

wParam Rich Edit 1.0 and 3.0: A pointer to a POINTL structure that receives the client area coordinates of the character. The coordinates are in screen units and are relative to the upper-left corner of the control's client area.

Edit controls and Rich Edit 2.0: The zero-based index of the character

lParam Rich Edit 1.0 and 3.0: The zero-based index of the character.

Edit controls and Rich Edit 2.0: This parameter is not used.

You can send this message to either an edit control or a rich edit control.

wParam This parameter is not used

lParam The coordinates of a point in the control's client area.

The coordinates are in screen units and are relative to the upper-left corner of the control's client area

wParam if the cue banner should show even when the edit control has focus; otherwise, .

is the default behavior—the cue banner disappears when the user clicks in the control.

lParam A pointer to a Unicode string that contains the text to display as the textual cue.