What's the api to import the txt document of equations ? it is not the api to link outer doc

I find the bug of the version -2012,when I use VB ,I can't  add  the equations by the head of "D2..."  or "D3..."

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Set swp = CreateObject("SldWorks.Application")

swp.Visible = True

Set swModel = swp.ActiveDoc

Set instance = swModel.GetEquationMgr

a = Split(Text1.Text, vbCrLf)

For i = 0 To UBound(a)

VA = instance.Add2(i + 1, a(i), False)

Text1.text:

"L"= "L1"

"W"= "W1"

"H"= "H1"

"A"= "A1"

"B"= "B1"

"C"= "C1"

"D"= "D1"

"M"= "M1"

"N"= "N1"

"D2@Z1@dituo<1>.Assembly" = "M"

"D1@Z1@dituo<1>.Assembly" = "N"

"D2@S1@dituomianban<1>.Part@dituo<1>.Assembly"= "W"

"D1@S1@dituomianban<1>.Part@dituo<1>.Assembly"= "L"

"D1@L1@dituomianban<1>.Part@dituo<1>.Assembly"= "A"

"D1@Z2@dituo<1>.Assembly" = "N"

"D1@J1@dituo<1>.Assembly"= "B" + "C"

"D1@J2@dituo<1>.Assembly" = "B" + "C"

"D1@S1@dCEBANMIANBAN<1>.Part@dceban<1>.Assembly"= "L" + 2 * ( "B" + "C" )

"D2@S1@dCEBANMIANBAN<1>.Part@dceban<1>.Assembly"  = "H" + "A" + "C"

"D1@L1@dCEBANMIANBAN<1>.Part@dceban<1>.Assembly"= "B"

"D1@S1@dCEBANHENGJIN<1>.Part@dceban<1>.Assembly"  = "L" + 2 * ( "B" + "C" )

"D2@S1@dCEBANHENGJIN<1>.Part@dceban<1>.Assembly"= "D"

"D1@L1@dCEBANHENGJIN<1>.Part@dceban<1>.Assembly"= "C"

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SolidworksApi macros