This example gets the text from a Dialog Box entry field as an integer value.

#define INCL_WINDIALOGS
#define INCL_WINBUTTONS
#include <OS2.H>
#define ID_ENTRYFLD 900
#define EM_SETTEXTLIMIT 2
HAB hab;
HWND  hwnd;
ULONG  msg;

switch(msg)
 {
  case WM_INITDLG:

/* set entry field text limit. */
   WinSendDlgItemMsg(hwnd,
         /* identifier of the entry field window, which is */
         /* a child of the the window defined by hwnd.     */
                      (ULONG)ID_ENTRYFLD,
                      (ULONG)EM_SETTEXTLIMIT,  /* Limit length */
         /* MPFROM2SHORT macro is of the form (low 2 bytes, */
         /* high 2 bytes), the the number passed is simply 2. */
                     MPFROM2SHORT(2,0),
                     (MPARAM)0);

/* set entry field to 12. */
   WinSetDlgItemShort(hwnd, ID_ENTRYFLD, (SHORT)12,TRUE);
  }