NAME

Win32::ErrorMode - Set and retrieves the error mode for the current process.

VERSION

version 0.07

SYNOPSIS

 use Win32::ErrorMode qw( :all );
 
 my $error_mode = GetErrorMode();
 SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX);
 
 system "program_that_would_normal_produce_an_error_dialog.exe";

Using the thread interface (preferred):

 use Win32::ErrorMode qw( :all );
 
 # The "Thread" versions are safer if you are using threads,
 # which includes the use of fork() on Windows.
 my $error_mode = GetThreadErrorMode();
 SetThreadErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX);
 
 system "program_that_would_normal_produce_an_error_dialog.exe";

Tie interface:

 # use "if" so that your code will still work on non-windows
 use if $^O eq 'MSWin32', 'Win32::ErrorMode';
 
 # 0x3 = SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX
 local $Win32::ErrorMode::ErrorMode = 0x3;
 
 system "program_that_would_normal_produce_an_error_dialog.exe";

Tie interface thread:

 use if $^O eq 'MSWin32', 'Win32::ErrorMode';
 
 # 0x3 = SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX
 local $Win32::ErrorMode::ThreadErrorMode = 0x3;
 
 system "program_that_would_normal_produce_an_error_dialog.exe";

DESCRIPTION

The main motivation for this module is to provide an interface for turning off those blasted dialog boxes when you try to run .exe with missing symbols or .dll files. This is useful when you have a long running process or a test suite where such failures are expected, or part of the configuration process.

It may have other applications.

This module also provides a tied interface $ErrorMode and $ThreadErrorMode.

FUNCTIONS

SetErrorMode

 SetErrorMode($mode);

Controls whether Windows will handle the specified type of serious errors or whether the process will handle them.

$mode can be zero or more of the following values, bitwise or'd together:

SEM_FAILCRITICALERRORS

Do not display the critical error message box.

SEM_NOALIGNMENTFAULTEXCEPT

Automatically fix memory alignment faults.

SEM_NOGPFAULTERRORBOX

Do not display the windows error reporting dialog.

SEM_NOOPENFILEERRORBOX

Do not display a message box when the system fails to find a file.

GetErrorMode

 my $mode = GetErrorMode();

Retrieves the error mode for the current process.

SetThreadErrorMode

 SetThreadErrorMode($mode);

Same as "SetErrorMode" above, except it only changes the error mode on the current thread.

GetThreadErrorMode

 my $mode = GetThreadErrorMode();

Same as "GetErrorMode" above, except it only gets the error mode for the current thread.

CAVEATS

All of these functions are available in the oldest supported version of Windows, which is 8.1. Previous versions of this module would use dynamic loading and emulation to support some or all of the functions on older and newer systems, while maintaining binary compatibility back to Windows XP. Older versions could throw and exception for the threaded interface on older Windows systems. As of 0.07 the compatibility code has been removed: this module will only install and function on Windows 8.1 and later and all functions are fully supported.

SEE ALSO

Win32API::File includes an interface to SetErrorMode, but not GetErrorMode. The interface for this function appears to be a side effect of the main purpose of the module. The interface to SetErrorMode is not well documented in Win32API::File, but is usable.

AUTHOR

Graham Ollis <plicease@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2015 by Graham Ollis.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm Win32::ErrorMode

perl -MCPAN -e shell
install Win32::ErrorMode