This example takes a process identifier (pid) from the command line argument and uses the api's above to kill it.

#! perl -slw
use strict;
use Win32::API::Prototype;

ApiLink( 'kernel32', q[
    HANDLE OpenProcess(
        DWORD dwDesiredAccess,
        BOOL bInheritHandle,
        DWORD dwProcessId
    )
]) or die $^E;

ApiLink( 'kernel32', q[
    BOOL TerminateProcess(
    HANDLE hProcess,
    UINT uExitCode
    )
]) or die $^E;

my $pid = shift @ARGV  or die 'No pid supplied';

## The magic number 0x1f0fff == PROCESS_ALL_ACCESS
## See http://msdn.microsoft.com/library/default.asp
##  ?url=/library/en-us/dllproc/base/process_security_and_access_right
+s.asp
## for details/other possible values.
my $hProcess = OpenProcess( 0x1F0FFF, 0, $pid ) or die $^E;

TerminateProcess( $hProcess, -1 ) or die $^E;

__END__
c:\test>573923 784
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