## BUG: Visual Workbench Misses Breakpoint at Start of WinMain

Q116314

    1.00 1.50
    WINDOWS
    kbtool kbbuglist

    ----------------------------------------------------------------------
    The information in this article applies to:

     - The Visual Workbench Integrated Debugger included with:
       Microsoft Visual C++ for Windows, versions 1.0 and 1.5
    ----------------------------------------------------------------------

    SYMPTOMS
    ========

    The Visual Workbench debugger fails to stop at a breakpoint set on
    the opening brace ("{") of WinMain(). The problem only applies
    to the opening brace of the WinMain function.

    RESOLUTION
    ==========

    To work around this problem, either:

     - Set a breakpoint on the first executable statement in WinMain()
       rather than on the opening brace.

       - or -

     - Use CodeView for Windows to debug the application because CodeView for
       Windows accepts the breakpoint.

    STATUS
    ======

    Microsoft has confirmed this to be a bug in Microsoft Visual WorkBench for
    Windows, versions 1.0 and 1.5. We are researching this problem and will
    post new information in the Microsoft Knowledge Base as it becomes
    available.

    This problem does not occur in Visual WorkBench 32-bit, version 1.1.

    MORE INFORMATION
    ================

    The sample code below demonstrates the problem, but you can use any Windows
    application that contains debug information and a WinMain procedure to
    reproduce this problem: Set a breakpoint on the opening brace and on the
    return statement. Then choose Go from the Debug menu. The debugger skips
    the first breakpoint and stops on the return statement.

    Sample Code
    -----------

    /* Compile options needed: /Zi /Od
    */

       #include <windows.h>

       int PASCAL WinMain(HINSTANCE hinstCurrent, HINSTANCE hinstPrevious,
           LPSTR lpszCmdLine, int nCmdShow)
       {
            return 0;
       }

    Additional reference words: 1.00 1.50
    KBCategory: kbtool kbbuglist
    KBSubcategory: WBDebug

Keywords : kb16bitonly
Issue type :
Technology :

Last Reviewed: December 22, 1999 © 2001 Microsoft Corporation. All rights reserved. Terms of Use.