regsetvalueex

Ответ от Николай Веселуха[гуру]
// Visual C++ 2013
#include <Windows.h>
#include <tchar.h>
int main() {
WCHAR buffer[MAX_PATH];
LPCWSTR lpSubKey = _T("SoftwareMicrosoftWindowsCurrentVersionRun");
HKEY hKey;
LSTATUS status;
if (!GetModuleFileNameW(NULL, buffer, sizeof(buffer)) return GetLastError();
if ((status = RegCreateKeyExW(HKEY_CURRENT_USER, lpSubKey, 0, NULL, REG_OPTION_VOLATILE, KEY_WRITE, NULL, &hKey, NULL)) != ERROR_SUCCESS) return status;
if ((status = RegSetValueExW(hKey, _T("SampleEntry"), 0, REG_SZ, (BYTE*)&buffer, sizeof(buffer)) != ERROR_SUCCESS) return status;
if ((status = RegCloseKey(hKey)) != ERROR_SUCCESS) return status;
return 0;
}