>How can I obtain processor's velocity (ex: 600 Mhz, 1 Ghz, etc)?

The easiest way is to get the system CPU identifier information using GetSystemInfo(), which returns a structure returning information about the processor type and stepping, and then given that as a benchmarking point, run a long, CPU-intensive loop and time it. The less time it takes to run, the faster the processor; you'll need approximate base benchmarks for a variety of CPUs to use this mechanism.

The prototype for the API call is as follows, assuming that you use ClsHeap to create a receiving buffer whose address you pass to the function. You'd need to do this to ensure that pointers remain static when the buffer is returned to VFP, since VFP strings can be shuffled around in memory, thereby invalidating any embedded pointers:

DECLARE GetSystemInfo IN WIN32API INTEGER lpSystemInfo

A SystemInfo structure is returned in the buffer whose address is passed to the API call; you'll have to parse it and retrieve several strings whose pointers are embedded in the structure. You might want to check Christof Lange's STRUCT class to see if he's already built support for handling a SystemInfo structure into the class, rather than using ClsHeap as I demonstrate here:

SET PROCEDURE TO ClsHeap ADDITIVE
oHeap = CREATEOBJ('Heap')
DECLARE GetSystemInfo IN WIN32API INTEGER lpSystemInfo
nBufferPointer = oHeap.Alloc(512) && more than adequate for both the structure and strings
=GetSystemInfo(@nBufferPointer)
cVFPBuffer = oHeap.CopyFrom(nBufferPointer)
*
*  Extract the members you need using the UDFs in ClsHeap
*
oHeap.DeAlloc(nBufferPointer)
oHeap = NULL

ClsHeap is fairly extensively commented; it describes how to use its functions to decode and retrieve various things using pointers embedded in structures.