Created by Thomas Sparber 2016
This is a very simple library written in C++ to execute WMI queries. The aim is to make it as simple as possible and stick as much as possible to the C++ standard (avoid Microsoft specific things) so that it even compiles smoothly on MinGW.
I think it is so simple that a small program explains the usage without any further comments:
int main(int /*argc*/, char */*args*/[])
{
try {
Win32_ComputerSystem computer = retrieveWmi<Win32_ComputerSystem>();
Win32_ComputerSystemProduct product = retrieveWmi<Win32_ComputerSystemProduct>();
SoftwareLicensingService liscense = retrieveWmi<SoftwareLicensingService>();
Win32_OperatingSystem os_info = retrieveWmi<Win32_OperatingSystem>();
cout<<"Computername: "<<computer.Name<<" Domaind:"<<computer.Domain<<endl;
cout<<"Product: "<<product.Name<<" UUID:"<<product.UUID<<endl;
cout<<"Architecture: "<<os_info.OSArchitecture<<std::endl;
cout<<endl;
cout<<"Installed services:"<<endl;
for(const Win32_Service &service : retrieveAllWmi<Win32_Service>())
{
cout<<service.Caption<<endl;
}
} catch (const WmiException &ex) {
cerr<<"Wmi error: "<<ex.errorMessage<<", Code: "<<ex.hexErrorCode()<<endl;
return 1;
}
return 0;
}The include file <wmi.hpp> contains all interfaces to execute WMI queries. The include file <wmiclasses.hpp> contains some predefined WMI classes (e.g. Win32_ComputerSystem or Win32_Service...)
As already mentioned, the include file <wmiclasses.hpp> provides some standard WMI classes, but it is also very easy to add more of them. All you need to do is:
struct Win32_MyCustomClass
{
/**
* This function is called by requestWmi and requestAllWmi
* with the actual WmiResult
**/
void setProperties(const WmiResult &result, std::size_t index)
{
//EXAMPLE EXTRACTING PROPERTY TO CLASS
result.extract(index, "name", (*this).name);
}
/**
* This function is used to determine the actual WMI class name
**/
static std::string getWmiClassName()
{
return "Win32_MyCustomClass";
}
string name;
//All the other properties you wish to read from WMI
}; //end struct Win32_ComputerSystemThese two functions are the only requirements your class needs to have.