dim s_err as stringbuilder
dim xx(6) as double
dim ret_flag as integer
' This is a function to call an unmanaged C-style library function.
' The lib function fills an array of 6 doubles or error string.
Declare Auto Function calc Lib "calc32.dll " Alias "calc32.dll "( ByRef xx()
As Double, ByVal serr As System.Text.Str ingBuilder) As Integer
' Using the unmanaged function:
ret_flag = swe_calc(tjd_et , planet, iflag, xx(6), serr)
If I take out the 6 in the above line, I get error "number of indices is
less than the number of dimensions in the indexed array."
If I put it in, or put a zero in, like xx(0) or xx(6), I get the error
"value of type double cannot be converted to '1 dimensional array of
double'"
What is wrong here? TIA
--
Patrick Sullivan, AA-BA, BA-IT 4 4846
dim s_err as stringbuilder
dim xx(6) as double
dim ret_flag as integer
' This is a function to call an unmanaged C-style library function.
' The lib function fills an array of 6 doubles or error string.
Declare Auto Function calc Lib "calc32.dll " Alias "calc32.dll "( ByRef xx()
As Double, ByVal serr As System.Text.Str ingBuilder) As Integer
' Using the unmanaged function:
ret_flag = swe_calc(xx(6), serr)
If I take out the 6 in the above line, I get error "number of indices is
less than the number of dimensions in the indexed array."
If I put it in, or put a zero in, like xx(0) or xx(6), I get the error
"value of type double cannot be converted to '1 dimensional array of
double'"
What is wrong here? TIA
Patrick Sullivan wrote: dim s_err as stringbuilder dim xx(6) as double dim ret_flag as integer
' This is a function to call an unmanaged C-style library function. ' The lib function fills an array of 6 doubles or error string.
Declare Auto Function calc Lib "calc32.dll " Alias "calc32.dll "( ByRef xx() As Double, ByVal serr As System.Text.Str ingBuilder) As Integer
' Using the unmanaged function:
ret_flag = swe_calc(xx(6), serr)
Copy-and-pasting code is a much more reliable way of showing us your
code. Note that the Declare calls the function 'calc' but you call it
as 'swe_calc'. If we have to guess what you mean, it will take us
longer to help you. If I take out the 6 in the above line, I get error "number of indices is less than the number of dimensions in the indexed array."
If I put it in, or put a zero in, like xx(0) or xx(6), I get the error "value of type double cannot be converted to '1 dimensional array of double'"
Try
ret_flag = calc(xx, serr)
The function wants an array: it is xx - not xx(0) or xx(6) or xx() -
that is an array.
Also, xx should be initialised to an empty array before calling the
DLL, otherwise there will be nowehere to put the results:
xx = New Double(6) {}
Also also, all I have fixed is the syntax: I don't know enough about
calling unmanaged code to be able to say that this will definitely do
what you want.
--
Larry Lard
Replies to group please
Thanks Larry. You figured out what I wanted to know, I think. Interop is
kind of confusing. It took me quite a while to get the s_err to pass
compiling.
--
Patrick Sullivan, AA-BA, BA-IT
"Larry Lard" <la*******@hotm ail.com> wrote in message
news:11******** *************@g 10g2000cwb.goog legroups.com... Patrick Sullivan wrote: dim s_err as stringbuilder dim xx(6) as double dim ret_flag as integer
' This is a function to call an unmanaged C-style library function. ' The lib function fills an array of 6 doubles or error string.
Declare Auto Function calc Lib "calc32.dll " Alias "calc32.dll "( ByRef
xx() As Double, ByVal serr As System.Text.Str ingBuilder) As Integer
' Using the unmanaged function:
ret_flag = swe_calc(xx(6), serr)
Copy-and-pasting code is a much more reliable way of showing us your code. Note that the Declare calls the function 'calc' but you call it as 'swe_calc'. If we have to guess what you mean, it will take us longer to help you.
If I take out the 6 in the above line, I get error "number of indices is less than the number of dimensions in the indexed array."
If I put it in, or put a zero in, like xx(0) or xx(6), I get the error "value of type double cannot be converted to '1 dimensional array of double'"
Try
ret_flag = calc(xx, serr)
The function wants an array: it is xx - not xx(0) or xx(6) or xx() - that is an array.
Also, xx should be initialised to an empty array before calling the DLL, otherwise there will be nowehere to put the results:
xx = New Double(6) {}
Also also, all I have fixed is the syntax: I don't know enough about calling unmanaged code to be able to say that this will definitely do what you want.
-- Larry Lard Replies to group please
You are declaring an array of 7 doubles. To declare an array of 6
doubles, you have to do like this:
dim xx(5) as double
Patrick Sullivan wrote: dim s_err as stringbuilder dim xx(6) as double dim ret_flag as integer
' This is a function to call an unmanaged C-style library function. ' The lib function fills an array of 6 doubles or error string.
Declare Auto Function calc Lib "calc32.dll " Alias "calc32.dll "( ByRef xx() As Double, ByVal serr As System.Text.Str ingBuilder) As Integer
' Using the unmanaged function:
ret_flag = swe_calc(xx(6), serr)
If I take out the 6 in the above line, I get error "number of indices is less than the number of dimensions in the indexed array."
If I put it in, or put a zero in, like xx(0) or xx(6), I get the error "value of type double cannot be converted to '1 dimensional array of double'"
What is wrong here? TIA This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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