The multi-line entry field control window procedure responds to this message by returning the window parameters indicated by the fsStatus parameter of the WNDPARAMS data structure, identified by the pwndparams parameter.

In response to the WPM_CCHTEXT flag, the text length is reported in the CF_TEXT format. If it exceeds 64KB-1, then this value is reported. In response to the WPM_TEXT flag, text up to the amount returned for the WPM_CCHTEXT value is placed at the indicated location in CF_TEXT format.