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# Calculating Time

Posted on 2002-03-14
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Hi everybody,

I am establishing a connection using a dll. I need to know in milliseconds or nano seconds how long it is  taking to establish connection can anybody say how to perform this operation

Regards
Pushparaj
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Question by:v_pushparaj
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Accepted Solution

TimCottee earned 30 total points
ID: 6864620
Here is an  example of using GetTickCount api call to achieve this sort of thing:

Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDst As Any, pSrc As Any, ByVal ByteLen As Long)
Private Declare Function GetTickCount Lib "kernel32" () As Long
'KPD-Team 1999
'URL: http://www.allapi.net/
'E-Mail: KPDTeam@Allapi.net
Dim sSave As String, Cnt As Long, T As Long, Pos As Long, Length As Long
Const mStr = "Hello "
Length = Len(mStr)
sSave = Space(5000 * Length) 'make buffer for justified comparison
'Get the current tickcount
T = GetTickCount
Pos = 1
sSave = Space(5000 * Length)
For Cnt = 1 To 5000
Mid(sSave, Pos, Length) = mStr
Pos = Pos + Length
Next Cnt
'Show the results
MsgBox "It took Visual basic" + Str\$(GetTickCount - T) + " msecs. to add 5000 times a string to itself."
'Get the current tickcount
T = GetTickCount
Pos = 0
sSave = Space(5000 * Length)
For Cnt = 1 To 5000
CopyMemory ByVal StrPtr(sSave) + Pos, ByVal StrPtr(mStr), LenB(mStr)
Pos = Pos + LenB(mStr)
Next Cnt
'Show the results
MsgBox "It took CopyMemory" + Str\$(GetTickCount - T) + " msecs. to add 5000 times a string to itself."
End Sub
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Expert Comment

ID: 6867270
>>in milliseconds or nano seconds<<
AFAIK, maximum accuracy is +/- 50 ms.

Cheers
0

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Expert Comment

ID: 6900100
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Expert Comment

ID: 6992861
Admin notified of User neglect. Force-accepted by
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