This example uses WinGetDlgMsg to provide a modal dialog. When the user causes an open message (application defined IDM_OPEN), the dialog is loaded and displayed; WinGetDlgMsg then loops, grabbing messages from the queue and calling MyDlgRoutine-the dialog procedure which processes the messages-with the appropriate parameters. When the dialog issues a WM_QUIT, WinGetDlgMsg returns FALSE and the loop ends, returning control to owner window.

#define INCL_WINDIALOGS         /* Window Dialog Mgr Functions  */
#include <os2.h>

HWND   hwnd;            /* owner window                         */
HWND   hwndDlg;         /* dialog window                        */
PQMSG  pqmsgmsg;        /* message                              */

case IDM_OPEN:
     hwndDlg = WinLoadDlg(HWND_DESKTOP,  /* parent is desk top */
                          hwnd,         /* owner window handle */
                          NULL,          /* modeless dialog */
                          0L,            /* load from .EXE */
                          DLG_ID,        /* dialog resource id */
                          NULL);       /* no dialog parameters */

     /* loop and process dialog messages until WM_QUIT, calling
        dialog procedure for each message */
     while (WinGetDlgMsg(hwndDlg, &qmsg))
        MyDlgRoutine(hwndDlg, qmsg.msg, qmsg.mp1, qmsg.mp2);
     break;



MRESULT MyDlgRoutine(HWND  hwndDlg, ULONG usMsgid, MPARAM mp1,
                     MPARAM mp2)
{
switch(usMsgid)
   {
   /*
   .
   . process messages
   .
   */

   default:
      return (WinDefDlgProc(hwndDlg, usMsgid, mp1, mp2));
   }
}