这里有一些代码在linux中代码:
void set_leds(int val)
{
int fd = open ("/dev/console", O_WRONLY);
// argument (Bit 0 - Scroll Lock, Bit 1 - Num Lock, Bit 2 - Caps lock)
ioctl (fd, KDSETLED, val);
close(fd);
}
void set_leds_sequence(unsigned char * cmdSeq, int len)
{
int i;
for (i = 0; i < len; ++i)
{
set_leds( cmdSeq[i] );
}
}
void activate(void)
{
unsigned char seq_activate[3] = {3, 5, 4};
set_leds_sequence(seq_activate, 3);
}
我如何在Windows(C ++ \ C)上做类似的事情?我有一种感觉,keybd_event不接近我。 是否有一种简单的方法可以打开/关闭Windows上的Caps Lock,Scroll Lock和Num Lock LEDS?
答案 0 :(得分:1)
我在这里找到代码:https://github.com/ftk/kbled/blob/master/keyboard.c
#define IOCTL_KEYBOARD_SET_INDICATORS CTL_CODE(FILE_DEVICE_KEYBOARD, 0x0002, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_KEYBOARD_QUERY_INDICATORS CTL_CODE(FILE_DEVICE_KEYBOARD, 0x0010, METHOD_BUFFERED, FILE_ANY_ACCESS)
static HANDLE kbd;
using namespace std;
void OpenKeyboardDevice()
{
if (!DefineDosDevice(DDD_RAW_TARGET_PATH, L"Kbd000000",
L"\\Device\\KeyboardClass0"))
{
assert(false);
}
kbd = CreateFile(L"\\\\.\\Kbd000000", GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
assert(kbd);
}
void CloseKeyboardDevice()
{
DefineDosDevice(DDD_REMOVE_DEFINITION, L"Kbd000000", NULL);
CloseHandle(kbd);
}
int set_leds(int led)
{
uint32_t input = 0;
DWORD len;
input |= led << 16;
if (!DeviceIoControl(kbd, IOCTL_KEYBOARD_SET_INDICATORS,
&input, sizeof(input),
NULL, 0,
&len, NULL))
return GetLastError();
return 0;
}
void set_leds_sequence(unsigned char * cmdSeq, int len)
{
int i;
for (i = 0; i < len; ++i)
{
set_leds(cmdSeq[i]);
}
}