Re: [Dev-C++] Reg Prog. (Frazell Thomas)

[Hoo H. <hoo...@ho...>]

Hi,
   This piece of code i wrote sometime ago, hope it helps.

//-----------------------------------------------------------------------=
-------
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include <string>

int main(int argc, char *argv[])
{
    HKEY hKey =3D NULL;
   =20
    DWORD TypeString =3D REG_SZ;
    DWORD TypeDword =3D REG_DWORD;
    char buf[256];
    DWORD RegVal =3D 0;
    unsigned long size;
    int rv =3D 0;
   =20
    std::string strKey =3D =
"Software\\Microsoft\\Windows\\CurrentVersion";
    std::string strQueryValue1 =3D "RegisteredOwner";
    std::string strQueryValue2 =3D "InstallType";

       =20
    rv =3D RegOpenKeyEx(HKEY_LOCAL_MACHINE,strKey.c_str(),0, =
KEY_ALL_ACCESS, &hKey);
    if (rv =3D=3D ERROR_SUCCESS)
         printf("RegOpenKeyEx success\n\n");
    else
    {
         printf("RegOpenKeyEx failed, this key does not exist\n");
         system("Pause");
         return 0;
    }

   =20
    //To query string value
    size =3D sizeof(buf);  =20
    rv  =3D RegQueryValueEx(hKey,strQueryValue1.c_str(), NULL, =
&TypeString, (unsigned char *) &buf, &size);
    if (rv =3D=3D ERROR_SUCCESS)
         printf("The registered owner for this product is %s\n",buf);
    else
         printf("Error query registry key %s\\%s\n", strKey.c_str(), =
strQueryValue1.c_str());


    //To query DWORD value
    size =3D sizeof(DWORD);  =20
    rv  =3D RegQueryValueEx(hKey,strQueryValue2.c_str(), NULL, =
&TypeDword, (unsigned char *) &RegVal, &size);
    if (rv =3D=3D ERROR_SUCCESS)
         printf("The install type is 0x%X\n",RegVal);
    else
    {
         printf("Error query registry key %s\\%s\n", strKey.c_str(), =
strQueryValue2.c_str());
    }
   =20
    HKEY hNewKey =3D NULL;
    std::string strNewSubKey =3D "TestKey";
    std::string strNewValue =3D "TestValue";
    std::string strNewValueData =3D "Testing 123";   =20
    DWORD dwDisposition =3D 0;
   =20
    //To create a new subkey
    printf("\nAbout to create new registry key, press Enter to =
continue");
    getchar();
    rv =3D RegCreateKeyEx(hKey, strNewSubKey.c_str(), 0, NULL, =
REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hNewKey, =
&dwDisposition);
    if (rv =3D=3D ERROR_SUCCESS)
    {
         if (dwDisposition =3D=3D REG_CREATED_NEW_KEY)
         {
             printf("New sub key created: %s\\%s\n", strKey.c_str(), =
strNewSubKey.c_str());
             printf("Verify it using regedit, press Enter to =
contiue\n");
             getchar();
         }
         else if (dwDisposition =3D=3D REG_OPENED_EXISTING_KEY)
             printf("Existing key opened\n");
    }
    else
         printf("Error create new key\n");
    if (hNewKey)
    {
         //To set a new value
         printf("About to set new value in new sub key, press Enter to =
continue");
         getchar();
         rv =3D RegSetValueEx(hNewKey, strNewValue.c_str(), 0, =
TypeString, (unsigned char *) strNewValueData.c_str(), =
strNewValueData.length());
         if (rv =3D=3D ERROR_SUCCESS)
         {
             printf("New value set\n");
             printf("Verify it using regedit, press Enter to =
continue\n");
             getchar();
         }
         else
             printf("Error setting new key value\n");
        =20
         //To change the new value
         strNewValueData =3D "Testing 456";
         printf("About to change new key value data, press Enter to =
continue");
         getchar();
         rv =3D RegSetValueEx(hNewKey, strNewValue.c_str(), 0, =
TypeString, (unsigned char *) strNewValueData.c_str(), =
strNewValueData.length());
         if (rv =3D=3D ERROR_SUCCESS)
         {
             printf("New value data changed\n");
             printf("Verify it using regedit, press Enter to =
continue\n");
             getchar();
         }
         else
             printf("Error changing new key value data\n");
            =20
         //To delete the new value
         printf("About to delete new key value, press Enter to =
continue");
         getchar();
         rv =3D RegDeleteValue(hNewKey, strNewValue.c_str());
         if (rv =3D=3D ERROR_SUCCESS)
         {
             printf("New key value deleted\n");
             printf("Verify it using regedit, press Enter to =
continue\n");
             getchar();
         }
         else
             printf("Error deleting new key value\n");
    }
    //To delete new key =20
    if (hNewKey)
       RegCloseKey(hNewKey);
    printf("About to delete new key value, press Enter to continue");
    getchar();
    rv =3D RegDeleteKey(hKey, strNewSubKey.c_str());
    if (rv =3D=3D ERROR_SUCCESS)
    {
        printf("New key deleted\n");
        printf("Verify it using regedit, press Enter to continue\n");
        getchar();
    }
    else
        printf("Error deleting new key\n");
   =20
      =20
    if (hKey)
       RegCloseKey(hKey);
    system("Pause");
    return 0;
}