C / C++ / MFC

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#include <windows.h><br />
#include <tchar.h><br />
#include <stdio.h><br />
#include <stdlib.h><br />
#include <winreg.h><br />
<br />
int main(int argc, char *argv[]) <br />
{<br />
<br />
<br />
   HKEY hk, hk2; <br />
   DWORD dwData, dwDisp; <br />
   TCHAR szBuf[MAX_PATH]; <br />
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   _snprintf(szBuf, sizeof(szBuf)-1, "SOFTWARE\\Microsoft"); <br />
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   if (RegCreateKeyEx(HKEY_LOCAL_MACHINE, szBuf, <br />
          0, NULL, REG_OPTION_NON_VOLATILE,<br />
          KEY_READ, NULL, &hk, &dwDisp)) <br />
   {<br />
      printf("Could not create the registry key."); <br />
      return FALSE;<br />
   }<br />
 <br />
<br />
   if (RegCreateKeyEx(hk, "Windows", <br />
          0, NULL, REG_OPTION_NON_VOLATILE,<br />
          KEY_WRITE, NULL, &hk2, &dwDisp)) <br />
   {<br />
      printf("Could not create the registry key."); <br />
      return FALSE;<br />
   }<br />
 <br />
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   LONG retValue = 0;<br />
   if ((retValue = RegSetValueEx(hk2,              // subkey handle <br />
           "TestWrite",        // value name <br />
           0,                         // must be zero <br />
           REG_EXPAND_SZ,             // value type <br />
           (LPBYTE) "data",        // pointer to value data <br />
           (DWORD) (sizeof("data"))))) // length of value data <br />
   {<br />
      printf("Could not set the value., error=%d", retValue); <br />
      return FALSE;<br />
   <br />
   }<br />
   <br />
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   <br />
    return 0;<br />
}<br />