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MSK Toolkit for Windows NT and Windows 95 Release 6.1, Mortice Kern Systems Inc. use visual .net barcode pdf417 integrated toattach pdf-417 2d barcode in .net ISO Specification MSK Toolkit for Windows NT and Windows 95 Release 6.1, Mortice Kern Systems Inc. The Win32::Process Module Another extension you can pdf417 2d barcode for .NET use to launch Windows applications is the object-oriented Win32::Process module. It provides a number of methods for creating and managing processes.

Processes can be suspended, resumed, and killed with this module.. Table 18.12. Win32::Proce ss Methods Method Create($Obj, $AppName, $CommandLine, $Inherit, $CreateFlags, $InitialDir); $Obj >GetExitCode($ExitCode); $Obj >GetPriorityClass($Class); $ProcessObj >GetProcessID() $Obj >Kill($ExitCode); $Obj >Resume(); $Obj >SetPriorityClass($Class); $Obj >Suspend(); $Obj >Wait($Timeout); What It Does Creates the process object Gets the exit code of the process Gets the process priority class Returns the process ID Kills the process with exit code Resumes a suspended process Sets the process affinity mask (NT) Suspends the process Waits for the process to die.

Example 18.56. 1 2 3 use Win32::Process; use Win32; sub ErrorReport{ print Win32::FormatMessage( Win32::GetLastError() ); } Win32::Process::Create($ProcessObj, "C:\\windows\\notepad.exe", "notepad myfile.txt", 0, NORMAL_PRIORITY_CLASS, ".

") . die ErrorReport(); print .net vs 2010 PDF417 "Notepad has started\n"; print "The exit code is: ",$ProcessObj->GetExitCode($ExitCode),"\n";. (Output) Notepad has star ted The exit code is: 1. Explanation 1. The Win32::Process module is loaded. It is used to launch Windows applications. 2. The Win32 module is loaded. 3. The ErrorReport functi on will send a formatted error message for the last system error that occurred, if there was one..

4. The Create function cr PDF417 for .NET eates a process.

The first argument, $ProcessObj, is a container for the process object, followed by the full pathname of the application, command-line arguments, and required flags.. 5. The exit code of the process is returned. 18.3. Other Ways to Interface with the Operating System If the system functions a re still not enough, Perl offers a number of alternative ways to deal with the operating system. You can use the syscall function, command substitution, the system function, and the here document to get system information..

18.3.1. The syscall Function and the h2ph Script The syscall function call s a specified system call with its arguments. If the C system call is not implemented, a fatal error is returned. The first argument is the name of the system call, preceded by &SYS_.

The remaining arguments are the actual parameters that are required by the real system call. If the argument is numeric, it is passed as a C integer. If not, the pointer to the string value is passed.

You may have to coerce a number to an integer by adding 0 to it if it is not a literal and cannot be interpreted by context. Before using the syscall function, you should run a script called h2ph (h2ph.bat on Windows) that comes with the Perl distribution.

At the bottom of the h2ph script (after _ _END_ _) are the manual pages for h2ph, including an explanation on how to run the script. This script converts the proper C header files to the corresponding Perl header files. These files must be added to the Perl library if you are using functions that require them.

All the files created have the .ph extension. After running the h2ph script, make sure that the @INC array in your program includes the path to these library functions.

[12]. [12]. See also the h2xs script that comes with Perl 5 distribution, for building a Perl extension from any C header file.. Format syscall (&SYS_NAME, LIST); Example 18.57. (UNIX: At the Command Lin PDF-417 2d barcode for .NET e) 1 $ cd /usr/include; /usr/local/bin/perl/h2ph * sys/* (In Script) #!/bin/perl # The name of the script is args.p 2 push(@INC, "/usr/local/lib"); 3 require "syscall.

ph"; 4 $bytes=syscall(&SYS_getpagesize); 5 printf "The pagesize for this Sparc Sun Workstation is %d bytes \n",$bytes; (Output) 5 The pagesize for this Sparc Sun Workstation is 4096 bytes.. Explanation 1. h2ph is executed so th .net framework pdf417 at the necessary C header files are converted to Perl header files.

The files created will be placed in /usr/local/lib and end with a .ph extension..

2. The directory containing the .ph files is pushed onto the @INC array. 3. The file is required for using C system calls. 4. The Perl syscall funct ion will call the getpagesize system call. The prefix &SYS_ is necessary Perl syntax.

It must be prepended to the real system call name.. 5. The page size for this Sun4c is 4,096 bytes. 18.3.2. Command Substitution The Backquotes Although we have already barcode pdf417 for .NET discussed command substitution and backquotes in 5, "What"s in a Name," a quick review might be in order here because command substitution is yet another way for Perl to interface with operating system commands. Backquotes are used by the UNIX/Linux shells (not Windows) to perform command substitution and are implemented in Perl scripts pretty much the same way.

For example, the command line echo The present working directory is "pwd" will cause the command in backquotes to be executed and its results substituted into the string. Like the UNIX/Linux shell, enclosing a command in backquotes causes it to be executed. Unlike the shell, if double quotes surround the backquoted string, command substitution will not occur.

The output resulting from executing the command is saved in a scalar variable. Example 18.58.

. (The Script) #!/bin/perl 1 print "The hour is ","date"; 2 3 4 5 6 7 @d="date"; print $d[0]" @d=split(/ /,"date"); print "$d[0]\n" $machine="uname -n"; print "$machine\n"".
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