[OSRS-PROJ] proj.4 in VB

[Alexander Weidauer]

Hi Christopher,

May be it is sensefull to write a ocx control for the proj library?
Has anybode sutch a control in C++ because I writing in Delphi and
it seem to be wrong to use a DLL written in C set on top a API in Delphi
and write a OCX to get it for visual basic ?

Bye Alex

Christopher Pouliot schrieb:
> Hello,
> 
> I have downloaded the proj.dll file (v4.4.6) and am trying
> unsuccessfully to use it in Visual Basic.  The simple initialization
> code below causes a fatal error in VB and crashes the program.  My
> experience working with external DLLs is limited so any assistance or
> sample VB code would be greatly appreciated.
> 
> Private Declare Function pj_init Lib "c:\software\proj\bin\proj.dll"
> (ByVal argc As Integer, ByRef argv() As String) As String
> 
> Private Sub Command1_Click()
>   Dim anArr(2) As String
>   Dim aResponse As String
>   
>   anArr(0) = "proj=utm"
>   anArr(1) = "zone=11"
>   anArr(2) = "ellps=GRS80"
>   
>   aResponse = pj_init(3, anArr)
> End Sub
> 
> 
> Thank you,
> 
> Chris
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