#include <windows.h>

void SystemWriteRegistry(void)
{
	HKEY hKey;
	DWORD dwPosition;
	char str[] = "StringValue";
	DWORD dwordValue = 100;
	char strArray[3][2] = {"1", "2", "3"};
	byte byteArray[] = {0, 1, 2};
	char esValue[] = "%windir%";
	DWORD qwordValue = 1000;

	RegCreateKeyEx(
		HKEY_CURRENT_USER,
		"Software\\test2\\sub",
		0,
		"",
		REG_OPTION_NON_VOLATILE,
		KEY_ALL_ACCESS,
		NULL,
		&hKey,
		&dwPosition);
	
	RegSetValueEx(
		hKey,
		"string",
		0,
		REG_SZ,
		(CONST BYTE*)(LPCTSTR)str,
		(int)sizeof(str)
	);

	RegSetValueEx(
		hKey,
		"int",
		0,
		REG_DWORD,
		(CONST BYTE *)&dwordValue,
		(int)sizeof(dwordValue)
	);
	
	RegSetValueEx(
		hKey,
		"StringArray",
		0,
		REG_MULTI_SZ,
		(CONST BYTE *)(LPCTSTR)strArray,
		(int)sizeof(strArray)
	);
	
	RegSetValueEx(
		hKey,
		"Bytes",
		0,
		REG_BINARY,
		byteArray,
		sizeof(byteArray)
	);
	
	RegSetValueEx(
		hKey,
		"ExpandString",
		0,
		REG_EXPAND_SZ,
		(CONST BYTE *)&esValue,
		(int)sizeof(esValue)
	);
	
	RegSetValueEx(
		hKey,
		"QWord",
		0,
		REG_QWORD,
		(CONST BYTE *)&qwordValue,
		(int)sizeof(qwordValue)
	);
	
	RegCloseKey(hKey);
}

int main(void)
{
	SystemWriteRegistry();
	
	return 0;
}