How does VC determine if the system is 64-bit?

Bool iswow64 ()
{
Typedef bool (winapi * lpfn_iswow64process) (handle, pbool );
Lpfn_iswow64process fniswow64process;
Bool biswow64 = false;
Fniswow64process = (lpfn_iswow64process) getprocaddress (getmodulehandle ("Kernel32"), "iswow64process ");
If (null! = Fniswow64process)
{
Fniswow64process (getcurrentprocess (), & biswow64 );
}
Return biswow64;
}
This parameter is used not to determine whether the function address is valid, but to determine the value of the output parameter biswow64.

 

 

There is also a getnativesysteminfo