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Inline ASM-VB
Strings
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Using inline ASM
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Using lookup tables for (complex) matrix operations speed up your code. Sin/Cos are very slow operations when they are performed repetively, compared to operations like """, "*", "+" With a lookup table you store common, values in an array for easy lookup. I used the lookup table from Lucky's VB Gaming Site. Please note that I'm working with degrees here... when using Radians it's more precise to keep them, and not to use a lookup table...

Code:
Public Sub TestTwo()
    Dim I As Long
    Dim sngCos As Single, sngSin As Single
    For I = 0 To 359 Step 1
        sngCos = CoSine(I, True)
        sngSin = Sine(I, True)
    Next I
End Sub

Public Sub TestOne()
    Dim I As Long
    Dim sngCos As Single, sngSin As Single
    For I = 0 To 359 Step 1
        sngCos = Cos(I * Pi / 180)
        sngSin = Sin(I * Pi / 180)
    Next I
End Sub