This example is the beginning of a function which processes the text which is displayed in the message text line.

#define INCL_WINDIALOGS
#define INCL_DOSMEMMGR
#include <OS2.H>
#define DID_MSGEDIT 900
void SelectMessageFromText(hwndDlg)
HWND    hwndDlg;
{

char *szTemp;
LONG  length;

    /* First get the edit text from the string */

 length = WinQueryDlgItemTextLength(hwndDlg,
                                     DID_MSGEDIT);
   /* now we know the buffer size needed. */

DosAllocMem((PPVOID)szTemp,
            (ULONG)length,
             PAG_READ |
             PAG_WRITE |
             PAG_COMMIT);

 WinQueryDlgItemText(hwndDlg,
                     DID_MSGEDIT,
                     sizeof(szTemp),
                     (PSZ)szTemp);
      /* . */
      /* . */
}