This example shows how to get the title-bar window text.

#define INCL_WINWINDOWMGR
#define INCL_DOSMEMMGR
#include <OS2.H>

HWND   hwndFrame;
PSZ    szTitle;
ULONG  cbBytes;

cbBytes =  WinQueryWindowTextLength(hwndFrame);

DosAllocMem((PPVOID)szTitle,
            (ULONG)cbBytes,
            PAG_READ  |
            PAG_WRITE |
            PAG_COMMIT);

WinQueryWindowText(hwndFrame, sizeof(szTitle), szTitle);