// see https://msdn.microsoft.com/en-us/library/windows/desktop/ms684139%28v=vs.85%29.aspx
public static bool?IsProcess64Bit(int processId)
{
if (!Environment.Is64BitOperatingSystem)
{
return(false);
}
// if this method is not available in your version of .NET, use GetNativeSystemInfo via P/Invoke instead
using (var processHandle = ProcessNativeMethods.OpenProcess(processId, ProcessAccessFlags.QueryLimitedInformation))
{
if (processHandle.IsInvalid)
{
var errorCode = NativeMethods.GetLastError();
if (errorCode == 5)
{
return(null);//no access
}
throw new Win32Exception(errorCode);
}
if (!ProcessNativeMethods.IsWow64Process(processHandle.DangerousGetHandle(), out var isWow64))
{
var errorCode = NativeMethods.GetLastError();
throw new Win32Exception(errorCode);
}
return(!isWow64);
}
}
private static int GetProcessBitness(IntPtr hProcess)
{
if (System.Environment.Is64BitOperatingSystem)
{
bool wow64;
if (!ProcessNativeMethods.IsWow64Process(hProcess, out wow64))
{
return(32);
}
if (wow64)
{
return(32);
}
return(64);
}
else
{
return(32);
}
}