A simple utility to simulate typing of unicode characters in Windows

unikey.c

/*
   Compilation instructions:
     1. Open VS developer console
     2. cl.exe /Feunikey.exe unikey.c
     3. You're done. It's that simple. :)
*/

#include <windows.h>
#include <stdio.h>

#pragma comment(lib, "user32")

#define PRINT_USAGE() printf("Usage: %s <codepoint> [<sleep time>]\n", argv[0])

int main(int argc, char * argv[])
{
	int codepoint;
	INPUT inputs[2];

	if (argc < 2 || argc > 4)
	{
		PRINT_USAGE();
		return 1;
	}

	codepoint = atoi(argv[1]);
	if (!codepoint)
	{
		sscanf(argv[1], "%x", &codepoint);
		if (!codepoint)
		{
			PRINT_USAGE();
			return 2;
		}
	}

	if (argc == 3)
	{
		Sleep(atoi(argv[2]));
	}

	memset(&inputs[0], 0, sizeof(inputs[0]));
	inputs[0].type = INPUT_KEYBOARD;
	inputs[0].ki.wScan = codepoint;
	inputs[0].ki.dwFlags = KEYEVENTF_UNICODE;

	memcpy(&inputs[1], &inputs[0], sizeof(inputs[0]));
	inputs[1].ki.dwFlags |= KEYEVENTF_KEYUP;

	codepoint = SendInput(2, inputs, sizeof(inputs[0]));
	if (codepoint)
	{
		return 0;
	}
	return GetLastError();
}