Re: Remapping Keyboard on Win32

[gryphon]

Greetings all,

The bad news is that I haven't been able to solve this problem yet. The good news is that my wrist is healing much faster than expected, and I'm now in a smaller splint that frees up my right hand for typing. So I'm abandoning this effort; however, just in case someone else wants to work on this in the future, here's the code I ended up with:

use strict;
use warnings;
use Win32::API;
use Win32::API::Callback;

use constant WH_KEYBOARD => 2;
use constant LEFT_SHIFT  => 0xA0;

my $get_thread_id = Win32::API->new('kernel32', 'int GetCurrentThreadI
+d()');
my $get_key_state = Win32::API->new('user32', 'GetKeyState',      'I',
+    'I');
my $set_hook      = Win32::API->new('user32', 'SetWindowsHookEx', 'IKI
+I', 'I');
my $call_next     = Win32::API->new('user32', 'CallNextHookEx',   'III
+I', 'I');
my $unhook_hook   = Win32::API->new(
    'user32', 'BOOL UnhookWindowsHookEx(int hookHandle)'
);

my $hook;
my $n = 0;
my $callback = Win32::API::Callback->new(
    sub {
        $n++;
        my $next = $call_next->Call($hook, @_);
        return $next;
    },
    'III',
    'I',
);

my $thread_id = $get_thread_id->Call();
print "Thread ID: $thread_id\n";

$hook = $set_hook->Call(WH_KEYBOARD, $callback, 0, $thread_id);

for (0 .. 9) {
    printf "%1d : %3d, %4d\n",
        $_, $n, $get_key_state->Call( LEFT_SHIFT ) || 0;
    sleep 1;
}

my $rv = $unhook_hook->Call($hook);

I primarily used this codefetch.com example along with Win32::API. Although I'm not seeing any errors, I don't think I'm getting the keyboard hook set correctly because $n never increments no matter how many keys I hit while the script runs. The $get_key_state call works just fine, but I can't seem get $callback to get called on keypress. Oh well.

[Anonymous Monk]

Again, in case someone else ends up here, you might want to check out the Scan Code Mapper for Windows. Basically, you add a registry key saying what keys you want to remap. Its simpler than writing anything if your requirements are straightforward. http://www.microsoft.com/whdc/device/input/w2kscan-map.mspx Night