Function IsProcess64Bit

source/util.cpp:1954–1984

BOOL IsProcess64Bit(HANDLE aHandle)
{
	BOOL is32on64;
#ifdef _WIN64
	// No need to load the function dynamically in this case since it should exist on all OSes
	// which are able to load 64-bit executables (such as ours):
	if (IsWow64Process(aHandle, &is32on64))
		return !is32on64; // 64-bit if not running under WOW64.
	// Since above didn't return, an error occurred.  MSDN isn't clear about what conditions can
	// cause this, so for simplicity just assume the target process is 64-bit (like this one).
	return TRUE;
#else
	if (IsWow64Process(GetCurrentProcess(), &is32on64))
	{
		if (is32on64)
		{
			// We're running under WOW64.  Since WOW64 only exists on 64-bit systems and on such systems
			// 32-bit processes can run ONLY under WOW64, if the target process is also running under
			// WOW64 it must be 32-bit; otherwise it must be 64-bit.
			if (IsWow64Process(aHandle, &is32on64))
				return !is32on64;
		}
	}
	// Since above didn't return, one of the following is true:
	//  a) IsWow64Process failed on the first or second call.  MSDN isn't clear about what conditions
	//     can cause this, so for simplicity just assume the target process is 32-bit (like this one).
	//  b) The current process is not running under WOW64.  Since we know it is 32-bit (due to our use
	//     of conditional compilation), the OS and all running processes must be 32-bit.
	return FALSE;
#endif
}

BOOL IsOS64Bit()
{