Return to init.c CVS log

Up to [OS/2 SDKs] / os232sdk / toolkt20 / c / samples / template

Microsoft OS/2 SDK 2.0 05-30-1990

/*==============================================================*\
 *  Init.c - routines for initialization and exit processing
 *      Created 1989, 1990 Microsoft Corp.
 *--------------------------------------------------------------
 *
 *  This module contains the code for application initialization
 *  as well as the code for exit list processing
 *
 *--------------------------------------------------------------
 *
 *  This source file contains the following functions:
 *
 *      Init() - initialization routines
 *      InitMainWindow(hwnd, mp1, mp2)
 *      ExitProc(usTermCode) - exit list processing procedure
 *
\*==============================================================*/

/*--------------------------------------------------------------*\
 *  Include files, macros, defined constants, and externs
\*--------------------------------------------------------------*/

#define  INCL_WINWINDOWMGR
#define  INCL_DOSPROCESS

#include <os2.h>
#include <string.h>
#include "main.h"
#include "xtrn.h"

/*--------------------------------------------------------------*\
 *  Global variables
\*--------------------------------------------------------------*/


/*--------------------------------------------------------------*\
 *  Entry point declarations
\*--------------------------------------------------------------*/

/****************************************************************\
 *  Initialization routine
 *--------------------------------------------------------------
 *
 *  Name:   Init()
 *
 *  Purpose: Performs initialization functions required
 *              before the main window can be created.
 *
 *  Usage:  Called once before the main window is created.
 *
 *  Method:
 *          - installs the routine ExitProc into the
 *              DosExitList chain
 *          - registers all window classes
 *          - performs any command line processing
 *
 *  Returns:
 *          TRUE - initialization is successful
 *          FALSE - initialization failed
\****************************************************************/
BOOL Init(VOID)
{

    /* Add ExitProc to the exit list to handle the exit processing.  If
     * there is an error, then terminate the process since there have
     * not been any resources allocated yet
     */
    if(DosExitList(EXLST_ADD, (PFNEXITLIST)ExitProc))  {
        MessageBox(HWND_DESKTOP,
                   IDMSG_CANNOTLOADEXITLIST,
                   MB_OK | MB_ERROR,
                   TRUE);
        DosExit(EXIT_PROCESS, RETURN_ERROR);
    }

    /* initialize the print dialog structures */
    InitPrintingDialogs();

    /* load application name from resource file */
    if(!WinLoadString(hab, NULL, IDS_APPNAME, MAXNAMEL, szAppName))
        return FALSE;

    /* load "untitled" string */
    if(!WinLoadString(hab, NULL, IDS_UNTITLED, MESSAGELEN, szUntitled))
        return FALSE;

    /* register the main client window class */
    if(!WinRegisterClass(hab,
                        (PSZ)szAppName,
                        (PFNWP)MainWndProc,
                        CS_SIZEREDRAW | CS_CLIPCHILDREN,
                        0))  {
        return FALSE;
    }

    /* If you wish to create a thread for background processing, define
     *  the BACKGROUND_THREAD constant
     *  the routine commented out here.  The routines for the background
     *  thread are in the thrd.c file.
     */

#ifdef BACKGROUND_THREAD
    /* see main.h for comment on using a background thread */

    if(!CreateBackgroundThread())
        return FALSE;

#endif

    /*--------------------------------------------------*\
     *      Add any command line processing here
    \*--------------------------------------------------*/


    return TRUE;

}  /* Init() */

/****************************************************************\
 *  Initialization routine
 *--------------------------------------------------------------
 *
 *  Name:   InitMainWindow(hwnd, mp1, mp2)
 *
 *  Purpose: Performs initialization functions required
 *              when the main window is created.
 *
 *  Usage:  Called once during the WM_CREATE processing when
 *          the main window is created.
 *
 *  Method:
 *
 *  Returns: value to be returned from the WM_CREATE message:
 *          TRUE - window creation should stop
 *          FALSE - window creation should continue
\****************************************************************/
MRESULT InitMainWindow(hwnd, mp1, mp2)
HWND hwnd;      /* handle to the main client window */
MPARAM mp1;     /* first parameter of WM_CREATE message */
MPARAM mp2;     /* second parameter of WM_CREATE message */
{

    UpdateTitleText(((PCREATESTRUCT)PVOIDFROMMP(mp2))->hwndParent);

    /* return FALSE to continue window creation, TRUE to abort it */
    return (MRESULT)FALSE;



    /* This routine currently doesn't use the hwnd, mp1, and mp2 parameters *\
     *  so they are referenced here to prevent an 'Unreferenced Parameter'
    \*  warning at compile time                                             */

    hwnd;
    mp1;
    mp2;


}   /* InitMainWindow() */


/****************************************************************\
 *  Exit list processing procedure
 *--------------------------------------------------------------
 *
 *  Name:   ExitProc(usTermCode)
 *
 *  Purpose: Cleans up certain resources when the application
 *              terminates
 *
 *  Usage:  Routine is called by DosExitList when the
 *          application exits
 *
 *  Method: global resources, such as the main window and
 *          message queue, are destroyed and any system
 *          resources used are freed
 *
 *  Returns:  Returns EXLST_EXIT to the DosExitList handler
 *
\****************************************************************/

VOID PASCAL ExitProc(usTermCode)
USHORT usTermCode;      /* code for the reason for termination */
{

    /* destroy the main window if it exists */
    if(WinIsWindow(hab, hwndMainFrame))  {
        WinDestroyWindow(hwndMainFrame);
    }

    /*--------------------------------------------------*\
     *      Any other system resources used
     *      (e.g. memory or files) should be freed here
    \*--------------------------------------------------*/


    WinDestroyMsgQueue(hmq);

    WinTerminate(hab);

    DosExitList(EXLST_EXIT, 0L);    /* termination complete */



    /* This routine currently doesn't use the usTermCode parameter so *\
     *  it is referenced here to prevent an 'Unreferenced Parameter'
    \*  warning at compile time                                       */

    usTermCode;

}   /* ExitProc() */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.