Re: Calling and executing ArcGIS extension .dll inPython [SEC=PERSONAL]

I can't find the user manual referenced in AS13910, which makes it hard
to help.

 

Your setting up of the parameters (hllapiparams) to the hllapiproto()
call doesn't match the ctypes documentation as to how this information
needs to be structured.

 

 

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From: David Shi [mailto:[email protected]] 
Sent: Wednesday, 9 June 2010 1:57 AM
To: [email protected]
Subject: Re: [ctypes-users] ctypes-users Digest, Vol 49, Issue 2

 

http://arcscripts.esri.com/scripts.asp?eLang=&eProd=&perPage=10&eQuery=a
real&Submit2=Search
<http://arcscripts.esri.com/scripts.asp?eLang=&eProd=&perPage=10&eQuery=
areal&Submit2=Search> 

 

 

I have been trying to call and execute the ArcView 9.x one.

 

from ctypes import *

import ctypes

import arcgisscripting

gp = arcgisscripting.create()

 

# Load required toolboxes...

gp.AddToolbox("C:/Program Files/ArcGIS/ArcToolBox/Toolboxes/Data
Management Tools.tbx")

 

mylib = CDLL("d:\\SHImaps\AS13910\ArealInterpolator.dll")

 

 

from ctypes.wintypes import HWND, LPCSTR, UINT

prototype = WINFUNCTYPE(c_int, HWND, LPCSTR, LPCSTR, UINT)

addr = mylib._handle

myfunc = prototype(addr)

 

# Make a layer from the feature class

gp.MakeFeatureLayer("d:/shimaps/lc_2k.shp","lyr1") 

# Make a layer from the feature class

gp.MakeFeatureLayer("d:/shimaps/lc_2k.shp","lyr2") 

 

# Select all cities which overlap the chihuahua polygon

gp.SelectLayerByLocation("lyr2", "intersect", "lyr1")

 

 

hllapiparams = ("lyr1"), ("area"), ("lyr2"), ("lyr2")

 

hllapiproto = ctypes.WINFUNCTYPE(ctypes.c_ulong, ctypes.c_char_p,
ctypes.c_char_p, ctypes.c_ulong)

 

hllapi = hllapiproto((1, mylib), hllapiparams)

 

##hllapi = hllapiproto(("1", mylib), hllapiparams)

 

##hllapi = hllapiproto((1, mylib), hllapiparams)

 

The error message says number of parameters not correct.

 

I wonder how to set up prototypes and parameters to call and execute vb
.dll.

 

Regards.

 


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