VC读写注册表

读注册表:

void CRegeditDlg::OnQuery()
{
HKEY hKEY;
LPCTSTR data_Set="Software//Microsoft//Windows//CurrentVersion//";

//访问注册表,hHEY则保存此函数所打开的句柄
long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_READ,&hKEY));
if(ret0!=ERROR_SUCCESS)
{
MessageBox("Error!Can't open hKEY!");
return;
}
//查询有关的数据
LPBYTE owner_Get=new BYTE[80];
DWORD type_1=REG_SZ;
DWORD cbData_1=80;

long ret1=::RegQueryValueEx(hKEY,"RegisteredOwner",NULL,&type_1,owner_Get,&cbData_1);
if(ret1!=ERROR_SUCCESS)
{
MessageBox("Error!Can't query the value!");
return;
}

LPBYTE company_Get=new BYTE[80];
DWORD type_2=REG_SZ;
DWORD cbData_2=80;
long ret2=::RegQueryValueEx(hKEY,"RegisteredOrganization",NULL,&type_2,company_Get,&cbData_2);
if(ret2!=ERROR_SUCCESS)
{
MessageBox("Error!Can't query the value!");
return;
}

//将owner_Get company_Get转换成CString
m_strOwner=CString(owner_Get);
m_strCompany=CString(company_Get);
delete[] owner_Get;
delete[] company_Get;

//close the connection
::RegCloseKey(hKEY);
UpdateData(FALSE);
}

写注册表:

void CRegeditDlg::OnModify()
{
UpdateData(TRUE);
HKEY hKEY;
LPCTSTR data_Set="Software//Microsoft//Windows//CurrentVersion";

long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_WRITE,&hKEY));
if(ret0!=ERROR_SUCCESS)
{
MessageBox("Error! Can't open hKEY!");
return;
}
LPBYTE owner_Set=CString_To_LPBYTE(m_strOwner);
DWORD type_1=REG_SZ;
DWORD cbData_1=m_strOwner.GetLength()+1;

long ret1=::RegSetValueEx(hKEY,"RegisteredOwner",NULL,type_1,owner_Set,cbData_1);
if(ret1=ERROR_SUCCESS)
{
MessageBox("Error! Can't write the Reg!");
return;
}

LPBYTE company_Set=CString_To_LPBYTE(m_strCompany);
DWORD type_2=REG_SZ;
DWORD cbData_2=m_strCompany.GetLength()+1;
long ret2=::RegSetValueEx(hKEY,"RegisteredOrganization",NULL,type_2,company_Set,cbData_2);
if(ret1=ERROR_SUCCESS)
{
MessageBox("Error! Can't write the Reg!");
return;
}
else
{
MessageBox("Success!!");
}
}

LPBYTE CRegeditDlg::CString_To_LPBYTE(CString str)
{
LPBYTE lpb=new BYTE[str.GetLength()+1];
for(int i=0;i<str.GetLength();i++)
lpb[i]=str[i];
lpb[str.GetLength()]=0;
return lpb;
}