DllCall with multiple outputs

I am trying to access CPU MSR registers by using WinRing0 low-level driver.
All of the other functions work fine, however I am not able to access any functions which would return multiple values.

MSR Read function should return two DWORD;, eax and edx.
CPUID function should return quad DWORDs; eax, ebx, ecx, edx.

For RdMsr:

BOOL // TRUE: success, FALSE: failure
WINAPI Rdmsr(
		DWORD index,									// MSR index
		PDWORD eax,											 // bit  0-31
		PDWORD edx											  // bit 32-63

For CPUID:

BOOL // TRUE: success, FALSE: failure
WINAPI Cpuid(
		DWORD index,									// CPUID index
		PDWORD eax,
		PDWORD ebx,
		PDWORD ecx,
		PDWORD edx

$CPUID1[0] - $CPUID1[5] variables return zero, except $CPUID1[1] which is 1 (0x00000001) of course.

Any help would be highly appreciated as I am a total newbie with AutoIT