c++windowswinapiwin32-process

I have a question about the paramether of GetPriorityClass Function (and [in] attribute)

DWORD GetPriorityClass(
  [in] HANDLE hProcess
);

In the documentation they says if the function succeeds, the return value is the priority class of the specified process.

The parameter takes [in] HANDLE hProcess that will be the process that i will be take the priority, but i dont know what means [in] or if i have to put some data into the parameter.

The docs says the next thing :

[in] hProcess

A handle to the process.

But doesnt explain or show some example or how can i fill the param.

Solution

  • As you can see in the documentation, GetPriorityClass:

    Retrieves the priority class for the specified process.

    (emphasis is mine)

    The handle to the process is passed as the hProcess input argument (marked with the [in] attribute) to the function.
    This just means you have to supply it yourself.

    Something like:

    HANDLE hMyProcess = ...;
DWORD dwRes = GetPriorityClass(hMyProcess);
if (dwRes == 0)
{
    // Handle error
}
else
{
    // Use the priority class in dwRes
}

    Notes: