Edit-control messages are sent by an application to an edit control. In addition to the messages described below, the WM_ENABLE, WM_GETTEXT, WM_GETTEXTLENGTH, WM_KILLFOCUS, WM_SETFOCUS, WM_SETREDRAW, and WM_SETTEXT window messages can be used. The following list briefly describes each edit-control message:
| Message | Description | |
| EM_CANUNDO | Determines whether or not an edit control can respond correctly to an EM_UNDO message. | |
| EM_EMPTYUNDOBUFFER | Disables an edit control's ability to undo the last edit. | |
| EM_FMTLINES | Directs the edit control to add or remove the end-of-line character from wordwrapped text lines. | |
| EM_GETHANDLE | Returns the data handle of the buffer used to hold the contents of the control window. | |
| EM_GETLINE | Copies a line from the edit control. | |
| EM_GETLINECOUNT | Returns the number of lines of text in the edit control. | |
| EM_GETMODIFY | Returns the current value of the modify flag for a given edit control. The flag is set by the control if the user enters or modifies text within the control. | |
| EM_GETRECT | Returns the formatting rectangle of the edit control. | |
| EM_GETSEL | Returns the starting and ending character positions of the current selection. | |
| EM_LIMITTEXT | Limits the length of the text (in bytes) the user may enter. | |
| EM_LINEFROMCHAR | Returns the line number of the line that contains the character whose position (indexed from the beginning of the text) is specified by the wParam parameter. |
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| EM_LINEINDEX | Returns the number of character positions that occur before the first character in a given line. | |
| EM_LINELENGTH | Returns the length of a line (in bytes) in the edit control's text buffer. | |
| EM_LINESCROLL | Scrolls the contents of the edit control by the given number of lines. | |
| Message | Description | |
| EM_REPLACESEL | Replaces the current selection with new text. | |
| EM_SETHANDLE | Establishes the text buffer used to hold the contents of the edit-control window. | |
| EM_SETMODIFY | Sets the modify flag for a given edit control. |
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| EM_SETPASSWORDCHAR | Changes the password character for an edit control created with the ES_PASSWORD styles. | |
| EM_SETRECT | Sets the formatting rectangle for an edit control. | |
| EM_SETRECTNP | Identical to EM_SETRECT, except that the control is not repainted. | |
| EM_SETSEL | Selects all characters in the current text that are within the starting and ending character positions given by the lParam parameter. | |
| EM_SETTABSTOPS | Sets tab-stop positions in a multiline edit control. | |
| EM_SETWORDBREAK | Informs a multiline edit control that Windows has replaced the default word-break function with an application-supplied word-break function. | |
| EM_UNDO | Undoes the last edit in an edit control. | |
| WM_CLEAR | Deletes the current selection. | |
| WM_COPY | Sends the current selection to the clipboard in CF_TEXT format. | |
| WM_CUT | Sends the current selection to the clipboard in CF_TEXT format, and then deletes the selection from the control window. | |
| WM_PASTE | Inserts the data from the clipboard into the control window at the current cursor position. | |
| WM_UNDO | Undoes the previous action. |