This message returns the data handle of the buffer that holds the contents of the control window. The handle is always a local handle to a location in the application's data segment.
| Parameter | Description |
| wParam | Is not used. | |
| lParam | Is not used. |
The return value is a data handle that identifies the buffer that holds the contents of the edit control.
An application may send this message to a control only if it has created the dialog box containing the control with the DS_LOCALEDIT style flag set.