使用RegSetValueEx创建键值

#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <Windows.h>

using namespace std;


int main() {


    HKEY key;
    if (RegOpenKey(HKEY_CURRENT_USER, TEXT("Software\Microsoft\Windows\CurrentVersion\Themes\Personalize"), &key) != ERROR_SUCCESS)
    {
        cout << "unable to open registry";
    }

    DWORD value_data = 0;

    if (RegSetValueEx(key, TEXT("SystemUsesLightTheme"), 0, REG_DWORD, (const BYTE*)&value_data, sizeof(value_data)) != ERROR_SUCCESS)
    {
        RegCloseKey(key);
        cout << "Unable to set registry value value_name";
    }
    else
    {
        cout << "value_name was set" << endl;
    }

}

另外，RegCreateKeyEx是用来创建注册表里的键

RegCreateKeyEx(HKEY_CURRENT_USER, "Software\Microsoft\Windows\CurrentVersion\Themes\Personalize\Con", 0, NULL,       
            REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL)